Preheat the oven to 375°F (190°C). Line a sheet pan with parchment paper. Spread the diced bell peppers, onions, and cooked bacon evenly on the pan.
In a bowl, whisk together the eggs, milk, salt, and black pepper. Pour the mixture over the ingredients on the sheet pan. Sprinkle shredded cheddar cheese on top.
Bake for 20-25 minutes, or until the eggs are fully cooked and set. Remove from the oven and let cool slightly.
Cut the egg mixture into six equal portions. Place each portion inside a warm tortilla, roll it up tightly, and serve immediately or wrap for storage.