01 - Preheat the oven to 350°F. Grease a 9x13 inch casserole dish with nonstick spray or butter.
02 - In a large mixing bowl, whisk together the eggs, cottage cheese, garlic powder, smoked paprika, salt, and black pepper until fully combined and smooth.
03 - Gently stir in the cooked crumbled turkey sausage, diced bell pepper, diced onion, chopped baby 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 6 equal portions. Serve warm.