Smashed Avocado and Fried Egg Sourdough Breakfast Sandwich with Chilli and Hemp Seeds

Name: Smashed Avocado and Fried Egg Sourdough Breakfast Sandwich with Chilli and Hemp Seeds
Prep time: 7 min
Cook time: 5 min
Total time: 12 min
Yield: 1 serving
Ingredients: 1 thick slice wholegrain sourdough bread (approximately 40g, choose a dense, seedy loaf for maxim...; 1 medium ripe avocado (halved and stone removed); 1 large free-range egg; 1 tsp extra virgin olive oil (for frying the egg); 1 tbsp fresh lemon juice (approximately half a small lemon); 1 small clove garlic (finely grated or minced); 1 handful baby spinach leaves (about 20g, fresh); 3 tbsp hemp seeds (shelled, also called hemp hearts); 25 g reduced-fat feta cheese (crumbled); 0.25 tsp dried chilli flakes (adjust to your heat preference); 1 pinch flaky sea salt; 1 pinch cracked black pepper; 0.5 tsp sesame seeds (optional, for extra texture and micronutrients)

High ProteinNut-Free

Prep Time7 min

Cook Time5 min

Servings1

Calories420 kcal

Health Score8/10

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Smashed Avocado and Fried Egg Sourdough Breakfast Sandwich with Chilli and Hemp Seeds

Some mornings call for something that actually fills you up and keeps you going until lunch without a mid-morning energy crash. This smashed avocado and fried egg sourdough breakfast sandwich does exactly that. It layers creamy, lemony smashed avocado onto thick-cut wholegrain sourdough, then tops it with a perfectly cooked fried egg, a scatter of hemp seeds, crumbled feta, and a pinch of chilli flakes for a little kick. It looks like something you would order at a weekend brunch spot, but it comes together in around 12 minutes flat and costs a fraction of the price.

What makes this version genuinely healthier than the standard avocado toast you will find at most cafes is the careful layering of nutrients. Wholegrain sourdough is the starting point here, and it matters. The slow fermentation process in sourdough breaks down phytic acid, making minerals like magnesium and zinc far more bioavailable than in standard bread. Wholegrain varieties also bring extra fibre, which slows down glucose absorption and keeps you feeling full for longer. One slice here provides roughly 3 to 4 grams of fibre before you even add the toppings. The avocado itself brings heart-healthy monounsaturated fats, potassium, folate, and another solid hit of fibre. Rather than loading up with extra salt or heavy condiments, the smash gets brightness from fresh lemon juice and depth from a small amount of garlic, so the fat content stays in the good-fat category without tipping into excess calories.

The fried egg is the protein anchor of this sandwich. One large egg delivers around 6 grams of complete protein along with choline, which supports brain function and memory. To push the protein even higher without piling on extra calories, hemp seeds are sprinkled over the finished sandwich. Three tablespoons of hemp seeds add a further 9 to 10 grams of plant-based protein plus omega-3 fatty acids. The crumbled feta adds a salty, tangy contrast that lifts all the other flavours without needing much quantity at all. A little goes a long way, and a light hand keeps the sodium reasonable. Finished with baby spinach leaves tucked underneath the avocado, you are getting a genuine serving of greens with your breakfast before the day has even properly started.

This recipe is built for real life. You can have the avocado smash prepped in a bowl before your sourdough even finishes toasting. It works as a satisfying breakfast, a quick lunch, or even a light dinner when you need something nourishing without a big production. If you are making this for two people, just double everything. The components scale up effortlessly. For those tracking macros, one complete sandwich sits at around 420 calories with 22 grams of protein, 8 grams of fibre, and a fat profile that is predominantly unsaturated. That is a genuinely well-balanced meal, not just a piece of toast with some green stuff on top.

Ingredients

Serves:1

1 thick slice wholegrain sourdough bread (approximately 40g, choose a dense, seedy loaf for maximum fibre)
1 medium ripe avocado (halved and stone removed)
1 large free-range egg
1 tsp extra virgin olive oil (for frying the egg)
1 tbsp fresh lemon juice (approximately half a small lemon)
1 small clove garlic (finely grated or minced)
1 handful baby spinach leaves (about 20g, fresh)
3 tbsp hemp seeds (shelled, also called hemp hearts)
25 g reduced-fat feta cheese (crumbled)
0.3 tsp dried chilli flakes (adjust to your heat preference)
1 pinch flaky sea salt
1 pinch cracked black pepper
0.5 tsp sesame seeds (optional, for extra texture and micronutrients)

Instructions

1
Place your slice of wholegrain sourdough in the toaster or under a grill and toast until golden and crisp at the edges. You want a good firm base so the toppings do not make it soggy.
If your sourdough loaf is very fresh, toast it on a slightly higher setting to ensure it holds up under the avocado.
2
While the bread is toasting, scoop the avocado flesh into a small bowl. Add the fresh lemon juice, grated garlic, a pinch of sea salt, and a few cracks of black pepper. Use a fork to smash everything together, mixing until you have a chunky, spreadable texture. Do not over-blend it, a little texture makes it far more satisfying.
Taste the smash before spreading. If your avocado is very mild, an extra squeeze of lemon makes a big difference to the brightness.
3
Heat a small non-stick frying pan over a medium heat. Add the olive oil and let it warm for 30 seconds. Crack the egg directly into the pan. Cook for 2 to 3 minutes for a set white with a runny yolk, or cook for 3 to 4 minutes if you prefer a fully set yolk. Season the egg lightly with salt and pepper as it cooks.
For a slightly steamed effect, add a tiny splash of water to the pan and cover with a lid for the last 30 seconds of cooking. This sets the top of the white without flipping.
4
Lay the fresh baby spinach leaves across the surface of the toasted sourdough in an even layer. They will wilt slightly from the warmth of the toast, which is exactly what you want.
5
Spoon the smashed avocado generously over the spinach layer, spreading it right to the edges of the toast.
6
Carefully lift the fried egg from the pan and place it on top of the avocado smash, centring it on the toast.
7
Scatter the hemp seeds evenly over the top, followed by the crumbled feta and the chilli flakes. Finish with the optional sesame seeds if you are using them, and a final crack of black pepper.
Serve immediately while the egg is still warm and the toast remains crisp.

Nutrition per serving

420kcal

Calories

22g

Protein

28g

Carbs

26g

Fat

Fibre

Sugar

390mg

Sodium

Pro Tips

✓
Use an avocado that gives gently when pressed but has no black soft patches. An underripe avocado will not smash smoothly and will taste grassy.
✓
Wholegrain sourdough from a bakery rather than a supermarket sliced loaf will give you better texture, more fibre, and a noticeably superior flavour base for this sandwich.
✓
If you are making this for two, prep both avocado smashes before you start frying the eggs so everything finishes at the same time.
✓
Hemp seeds do not need to be toasted first but if you have an extra minute, a quick 60-second dry toast in the pan brings out a lovely nutty flavour.
✓
Keep the egg yolk runny if possible. When you break it, the yolk mixes with the avocado and creates a naturally saucy, rich finish that needs no extra dressing.
✓
Adding the spinach directly to the warm toast rather than on top keeps it neatly tucked in and prevents the leaves from sliding off when you cut or lift the sandwich.

Frequently Asked Questions

Can I use regular toast instead of sourdough for this breakfast sandwich?↓

Yes, you can. Any dense wholegrain or seeded bread works well. Sourdough is the preferred choice because the fermentation process improves digestibility and gives a more complex flavour, but a good wholegrain loaf will still deliver excellent nutrition. Avoid white bread where possible, as it offers far less fibre and causes faster blood sugar spikes.

How do I stop my avocado smash from going brown?↓

The lemon juice in this recipe acts as a natural antioxidant that significantly slows browning. If you are making the smash slightly ahead, press a piece of cling film directly onto the surface of the avocado mixture to limit air contact and keep it in the fridge. It will stay a good colour for up to an hour this way.

Is this smashed avocado and fried egg sourdough breakfast sandwich good for weight loss?↓

It can absolutely fit into a weight-loss approach. At around 420 calories per serving with 22 grams of protein and 8 grams of fibre, it is a genuinely filling meal that should keep hunger at bay for several hours. The combination of protein, healthy fats, and fibre is exactly what nutrition research points to for managing appetite and reducing overall daily calorie intake.

Can I make this dairy-free?↓

Very easily. Simply leave out the feta cheese or swap it for a dairy-free feta alternative made from plant-based ingredients. The sandwich still has plenty of flavour from the garlic, lemon, chilli, and hemp seeds. You could also add a few sunflower seeds for extra texture to replace what the feta would have contributed.

What is the best way to fry an egg for this sandwich?↓

A small non-stick pan over a steady medium heat is the key. Too high and the edges turn rubbery before the white is fully set. Too low and the egg steams rather than fries. The olive oil should shimmer but not smoke before you crack the egg in. Covering the pan briefly at the end gives you a beautifully set white while keeping the yolk runny.

How much protein does this breakfast sandwich have?↓

One serving provides approximately 22 grams of protein, coming from the egg, hemp seeds, and feta cheese. If you want to increase the protein further, you could add a second egg or incorporate a tablespoon of cottage cheese into the avocado smash without significantly changing the flavour or calorie count.

Variations

•
High-Protein Double Egg Version
Use two fried eggs instead of one and add a tablespoon of plain low-fat cottage cheese blended into the avocado smash. This pushes the protein to approximately 30 grams per serving, making it ideal for an active morning or post-workout breakfast.
•
Spiced Dukkah Crust
Swap the hemp seeds and chilli flakes for two tablespoons of dukkah, an Egyptian spice and nut blend made from coriander, cumin, sesame, and hazelnuts. It gives the sandwich a wonderfully aromatic, nutty crust that works brilliantly with the creamy avocado.
•
Sun-Dried Tomato and Basil Version
Add three or four roughly chopped sun-dried tomatoes in olive oil and a small handful of fresh basil leaves on top of the avocado smash. Leave out the chilli flakes and replace them with a pinch of dried oregano for an Italian-inspired flavour profile.
•
Smoked Salmon Addition
Layer two slices of smoked salmon between the spinach and the avocado smash. This adds an extra 10 to 12 grams of protein per serving and a lovely smoky, briny contrast. Reduce the feta to a small pinch as the salmon already brings plenty of saltiness.

Substitutions

•
Wholegrain sourdough → Gluten-free seeded bread (Suitable for those with coeliac disease or gluten sensitivity. Choose a seeded variety to maintain fibre content.)
•
Hemp seeds → Sunflower seeds or pumpkin seeds (Both provide healthy fats and some protein, though hemp seeds have a more complete amino acid profile. Either option maintains the textural contrast.)
•
Reduced-fat feta cheese → Nutritional yeast (Use one tablespoon of nutritional yeast for a dairy-free, cheesy flavour. It also adds B vitamins and a further small amount of protein.)
•
Fresh lemon juice → Apple cider vinegar (Use half a teaspoon rather than a full tablespoon as apple cider vinegar is more potent. It still provides the acidity needed to balance the avocado and slow browning.)
•
Baby spinach → Rocket or watercress (Both work beautifully here. Rocket adds a peppery bite and watercress brings a slightly mustard-like edge that pairs especially well with the egg.)
•
Olive oil for frying → Avocado oil spray (A light spray of avocado oil reduces the total fat from frying while maintaining a high smoke point for better egg cooking.)

🧊 Storage

This sandwich is best eaten immediately after assembling. The toasted sourdough will lose its crispness within a few minutes of being topped. You can store the avocado smash separately in a sealed container in the fridge for up to one hour with cling film pressed onto the surface. Do not store the assembled sandwich.

📅 Make Ahead

The avocado smash can be prepared up to one hour ahead and kept refrigerated with cling film pressed directly onto the surface to prevent browning. Hemp seeds and feta can be measured out in advance. Fry the egg fresh to order as reheated eggs lose their texture entirely.