High-Protein Hash Brown Breakfast Casserole with Turkey Sausage
This hash brown breakfast casserole with turkey sausage is the kind of dish that makes mornings genuinely exciting. It is warm, filling, and loaded with good-for-you ingredients that actually keep you satisfied until lunch. Unlike traditional versions that lean heavily on full-fat sausage, cream, and heaps of processed cheese, this recipe swaps in lean turkey sausage, egg whites blended with whole eggs, low-fat cottage cheese for creaminess, and a generous amount of vegetables to boost fibre and micronutrients. The result is a casserole that feels indulgent but works hard for your nutrition goals.
The hash brown base is the real backbone here. Frozen shredded hash browns keep things convenient without sacrificing anything in terms of flavour or texture. They crisp up beautifully along the bottom and edges of the dish, giving you that satisfying bite every time. The turkey sausage layer sitting above it is seasoned with smoked paprika, fennel seed, and a touch of garlic, so it has that proper breakfast sausage flavour without the saturated fat load that comes with pork. Spinach and red bell pepper are tucked throughout, adding colour, vitamins, and fibre in a way that feels natural rather than like a health compromise.
What really sets this recipe apart from others is the egg mixture. Combining whole eggs with egg whites and blended low-fat cottage cheese gives you a custard-style filling that is rich and creamy but significantly higher in protein than a standard egg-and-milk base. A modest amount of sharp cheddar goes on top because frankly a casserole without a golden, melted cheese crust is a missed opportunity. Using sharp cheddar means you get bold flavour from a smaller quantity, keeping the overall fat and calorie count in check. Each serving lands at around 310 calories and delivers close to 28 grams of protein, which is genuinely impressive for a breakfast dish.
Assembly is straightforward and the whole thing can be put together the night before, refrigerated, and baked fresh in the morning. That makes it ideal for busy weekdays when you want a proper breakfast without standing over the stove. It also feeds a crowd beautifully, making it a fantastic option for family gatherings or a brunch spread. Slice it into squares, serve it straight from the dish, and watch it disappear. Leftovers reheat brilliantly in the microwave or a low oven, so you are genuinely set for multiple mornings with one bake.
Ingredients
- 500 g frozen shredded hash browns (thawed and patted dry with paper towels)
- 1 tbsp olive oil
- 450 g lean turkey sausage (casings removed if using links, or ground turkey sausage)
- 1 medium red bell pepper (diced small)
- 1 medium yellow onion (diced small)
- 2 cups baby spinach (roughly chopped)
- 3 cloves garlic (minced)
- 1 tsp smoked paprika
- 0.5 tsp fennel seeds (lightly crushed)
- 0.5 tsp dried oregano
- 0.3 tsp black pepper
- 0.5 tsp salt (divided)
- 4 large whole eggs
- 6 large egg whites (from fresh eggs or carton egg whites)
- 1 cup low-fat cottage cheese (blended smooth in a blender)
- 0.5 cup unsweetened almond milk (or any low-fat milk of choice)
- 1 tsp Dijon mustard
- 0.8 cup sharp cheddar cheese (grated, divided)
- 2 tbsp fresh chives (chopped, for topping)
Instructions
- 1
Preheat your oven to 190 degrees Celsius (375 degrees Fahrenheit). Lightly spray a 9x13-inch baking dish with non-stick cooking spray and set aside.
- 2
Spread the thawed and well-dried hash browns evenly across the bottom of the prepared baking dish. Drizzle with olive oil, sprinkle with a pinch of salt and pepper, and press them down firmly into a compact, even layer.
Getting the hash browns as dry as possible is key to a crispy base. Press them between two clean tea towels and squeeze out any excess moisture.
- 3
Bake the hash brown layer uncovered for 20 minutes, until the edges just start to turn golden. Remove from the oven and set aside while you prepare the filling.
- 4
While the hash browns bake, heat a large non-stick skillet over medium-high heat. Add the turkey sausage and cook, breaking it into crumbles with a wooden spoon, for about 6 to 8 minutes until fully cooked through and lightly browned. Transfer to a plate and drain any excess liquid.
Season the turkey sausage with the smoked paprika, fennel seeds, and oregano as it cooks to build deep, savoury flavour throughout.
- 5
In the same skillet, add the diced onion and red bell pepper. Cook over medium heat for 4 minutes until softened. Add the garlic and cook for another 60 seconds. Stir in the chopped spinach and cook just until wilted, about 1 to 2 minutes. Season with a little salt and pepper then remove from heat.
- 6
In a large mixing bowl, whisk together the whole eggs, egg whites, blended cottage cheese, almond milk, Dijon mustard, remaining salt, and half of the grated cheddar until smooth and well combined.
Blending the cottage cheese until completely smooth before adding it ensures you get a silky, creamy custard without any lumps in the finished casserole.
- 7
Scatter the cooked turkey sausage evenly over the par-baked hash brown layer. Spoon the cooked vegetable mixture on top, distributing it as evenly as you can across the surface.
- 8
Pour the egg and cottage cheese mixture slowly and evenly over the sausage and vegetable layers, allowing it to settle into the gaps. Scatter the remaining grated cheddar across the top.
- 9
Return the casserole to the oven and bake uncovered for 30 to 35 minutes, until the egg mixture is fully set in the centre and the cheese on top is golden and bubbling. To test doneness, insert a knife into the centre. It should come out clean.
If the cheese starts browning too quickly before the centre is set, loosely tent the dish with foil for the remaining baking time.
- 10
Remove from the oven and allow the casserole to rest for 5 minutes before cutting. Scatter fresh chopped chives over the top, slice into 8 squares, and serve warm.
Nutrition per serving
310kcal
Calories
28g
Protein
22g
Carbs
11g
Fat
3g
Fibre
3g
Sugar
480mg
Sodium
Pro Tips
- ✓
Dry your hash browns thoroughly before baking. Excess moisture is the number one reason hash browns turn soggy rather than crispy.
- ✓
Use sharp or aged cheddar rather than mild. A stronger flavour means you can use less cheese overall while keeping every bite tasty.
- ✓
Let the casserole sit for at least 5 minutes after it comes out of the oven. This helps it set firmly so squares hold their shape when you serve them.
- ✓
If you are making this for meal prep, slice it fully once cooled, portion into individual containers, and refrigerate. It reheats beautifully in 90 seconds in the microwave.
- ✓
Blending the cottage cheese is a non-negotiable step for texture. A small blender or an immersion blender does the job quickly.
Frequently Asked Questions
Variations
- •
Spicy Southwest Version
Add one diced jalapeno to the vegetable saute step, swap the smoked paprika for chipotle powder, and stir 2 tablespoons of salsa into the egg mixture. Top with a small handful of crumbled reduced-fat feta alongside the cheddar for a tangy, spicy twist.
- •
Mediterranean Style
Replace the red bell pepper with sun-dried tomatoes and artichoke hearts. Swap the cheddar for crumbled reduced-fat feta cheese, and add a handful of kalamata olives and a teaspoon of dried thyme to the vegetable mixture for a Mediterranean-inspired variation.
- •
Dairy-Free Version
Replace the cottage cheese with silken tofu blended smooth, use unsweetened oat milk instead of almond milk, and top with a dairy-free cheddar-style shred. The casserole will still be creamy and satisfying, just without any dairy ingredients.
- •
Extra Green Detox Version
Double the spinach, add half a cup of frozen peas, and stir in a handful of chopped flat-leaf parsley and fresh dill to the egg mixture. This version packs in even more fibre, folate, and plant-based nutrients for a truly vibrant start to the day.
Substitutions
- •Turkey sausage → Lean ground turkey seasoned with sage, thyme, and fennel (If you cannot find pre-seasoned turkey sausage, season 450g of ground turkey yourself. Use half a teaspoon each of sage, thyme, fennel, and garlic powder.)
- •Low-fat cottage cheese → Plain low-fat Greek yogurt (Greek yogurt works well and maintains the protein boost. Blend or whisk it smooth before adding to the egg mixture. It adds a very slight tang which is actually quite pleasant.)
- •Unsweetened almond milk → Skimmed dairy milk or oat milk (Any low-fat, unsweetened milk works here. The quantity is small so it will not dramatically change the flavour or nutrition profile.)
- •Frozen hash browns → Freshly grated and wrung-out russet potatoes or sweet potatoes (Sweet potato hash browns add extra beta-carotene and a subtle sweetness. Prepare them the same way, making sure to squeeze out all excess moisture.)
- •Sharp cheddar → Gruyere or reduced-fat mozzarella (Gruyere gives a nutty, more complex flavour. Reduced-fat mozzarella melts beautifully and lowers the overall fat content further.)
🧊 Storage
Allow the casserole to cool completely before storing. Cover the baking dish tightly with cling film or transfer slices to airtight containers. Refrigerate for up to 4 days. To reheat, microwave individual portions for 90 seconds to 2 minutes, or warm slices in a 160-degree Celsius oven for 10 minutes. For longer storage, freeze individual slices wrapped in cling film and stored in a freezer bag for up to 2 months. Thaw overnight in the refrigerator before reheating.
📅 Make Ahead
Assemble the entire casserole the evening before, cover tightly, and refrigerate overnight. The next morning, remove it from the fridge 15 minutes before baking to take the chill off, then bake as directed, adding 5 minutes to the total bake time. This makes it a brilliant option for holiday mornings or when you are feeding a crowd and want to minimise morning effort.
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