Preheat the oven to 350°F (175°C). Grease a 12-cup muffin tin with cooking spray.
In a large bowl, combine chopped green bell pepper, red bell pepper, and green onions.
Add turkey ham pieces to the vegetable mixture.
In a separate bowl, whisk the eggs and milk until smooth.
Season the egg mixture with garlic powder, onion powder, salt, and black pepper.
Pour the egg mixture over the vegetables and mix well.
Evenly distribute the mixture into the muffin cups.
Sprinkle shredded Cheddar cheese on top of each muffin.
Bake for 18–22 minutes or until the eggs are set.
Let cool slightly before removing from the tin. Enjoy your Easy Breakfast Egg Muffins warm or store for later.