In a medium bowl, whisk together eggs, egg whites, cottage cheese, salt, and black pepper. Set aside.
Heat a large nonstick skillet over medium-high heat. Add olive oil, then hash browns, bell pepper, and onion.
Sauté for 4–5 minutes until vegetables are softened but still slightly crisp.
Add spinach, cover, and cook for 2–3 minutes until wilted.
Reduce heat to medium and pour in the egg mixture. Cook for 3–4 minutes, stirring often, until eggs are cooked through but still moist.
Remove mixture from heat and allow to cool slightly.
Warm a tortilla for 10 seconds to make it flexible. Fill with one-quarter of the egg mixture, one-quarter of the turkey sausage, and 2 tablespoons cheddar cheese.
Roll tightly and serve with desired toppings.
Optional: Crisp burritos in a skillet with a little oil for 1–2 minutes per side.