Preheat your oven to 375°F (190°C). Lightly grease a 9x13-inch baking dish with butter or oil.

Heat a skillet over medium heat. Add sausage and cook until browned and fully cooked, breaking it into crumbles. Remove excess grease if necessary and set aside.

In the same skillet, add olive oil or butter. Sauté onion and bell pepper until softened, about 4–5 minutes. Add garlic and cook for 30 seconds.

In a large bowl, whisk together eggs, milk, salt, pepper, paprika, and oregano until well combined.

Spread hash browns evenly across the bottom of the baking dish. Layer cooked sausage, sautéed vegetables, and half of the cheese on top.

Pour the egg mixture evenly over the layers. Sprinkle remaining cheese on top.

Bake uncovered for 40–45 minutes, or until the center is set and the top is golden.

Let the egg bake rest for 10 minutes before slicing. This helps it set and makes serving easier.