Preheat Oven: Set your oven to 350°F (175°C) and lightly grease a muffin tin with cooking spray or olive oil.
Mix the Eggs: In a large bowl, whisk together the eggs, milk (if using), salt, pepper, and any seasonings you like.
Add the Fillings: Stir in your vegetables and cooked bacon or sausage until evenly combined.
Fill the Muffin Tin: Pour the egg mixture into each muffin cup, filling them about ⅔ full. Top each with a sprinkle of shredded cheese.
Bake: Bake for 15–20 minutes, or until the eggs are set and the tops are lightly golden.
Cool and Serve: Let the muffins cool for a few minutes before removing them from the pan. Serve warm or store for later.
