In a skillet over medium heat, sauté the diced onion and bell pepper until soft, about 5 minutes.

Add the crumbled sausage and cook until browned, about 5 minutes.

In a mixing bowl, combine the beaten eggs, salt, and pepper. Pour the egg mixture into the skillet and scramble until fully cooked.

Preheat the oven to 375°F (190°C).

In a baking dish, arrange the tortillas and fill each with the egg mixture. Top with shredded cheddar cheese.

Bake in the preheated oven for 15 minutes, or until the cheese is melted and bubbly.

Remove from the oven and serve hot with sour cream, salsa, and avocado on the side.