Making a Sheet Pan Breakfast Egg Sandwich can be simple and enjoyable. Just follow these clear steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Sheet Pan: Grease a rimmed sheet pan with butter or oil to prevent sticking.
3. Whisk the Eggs: In a large bowl, whisk together the eggs, milk, salt, black pepper, and garlic powder until fully combined.
4. Add Vegetables and Meats: Stir in the diced bell peppers, onions, and cooked bacon or sausage into the egg mixture.
5. Pour into the Pan: Pour the egg mixture evenly into the prepared sheet pan.
6. Bake: Place the sheet pan in the oven and bake for 20-25 minutes or until the eggs are set and slightly golden on top.
7. Add Cheese: Remove the pan from the oven and sprinkle the shredded cheese on top. Return to the oven for an additional 5 minutes, or until the cheese is melted and bubbly.
8. Toast Bread: While the egg mixture is baking, you can toast your bread slices in a toaster or on a grill for added flavor.
9. Assemble the Sandwiches: Once the eggs are fully cooked, remove the pan from the oven and let it cool for a few minutes. Cut the egg mixture into squares that will fit your bread slices.
10. Build Your Sandwich: Place a square of the egg mixture between two slices of toasted bread. Optionally, add more cheese, lettuce, or other toppings as desired.

These steps ensure you create a delicious and satisfying breakfast sandwich, perfect for any morning!