In a large skillet, sauté diced onions and bell peppers over medium heat until softened.
In a bowl, whisk together eggs, milk, salt, and pepper.
Pour the egg mixture into the skillet with the vegetables and cook, stirring gently.
Once the eggs are almost set, add in the crumbled sausage and cheese.
Cook until the eggs are fully set and the cheese is melted.
Warm the tortillas in a separate skillet or microwave.
Place a generous scoop of the egg mixture into the center of each tortilla.
Fold in the sides of the tortilla, then roll it from the bottom up to enclose the filling.
Repeat with remaining tortillas and filling.
Serve warm with salsa and garnish with fresh cilantro.