01 - Preheat oven to 350°F. Lightly grease a 9x13 inch casserole dish with cooking spray or butter.
02 - In a large mixing bowl, whisk together the eggs, cottage cheese, garlic powder, smoked paprika, salt, and black pepper until smooth and well combined.
03 - Gently stir in the crumbled turkey sausage, diced bell pepper, onion, chopped spinach, and half of the shredded cheddar cheese until evenly distributed throughout the egg mixture.
04 - Pour the egg and filling mixture into the prepared casserole dish, spreading it into an even layer. Sprinkle the remaining cheddar cheese evenly across the top.
05 - Bake uncovered for 30 to 35 minutes, or until the center is fully set and the top is lightly golden. A knife inserted into the center should come out clean.
06 - Remove from the oven and let the casserole rest for 5 minutes before slicing into portions. Serve warm.