Begin by preheating your oven to 350°F (175°C) to prepare for baking.
In a sizable mixing bowl, crack the eggs and whisk them together with the milk, garlic powder, dried oregano, salt, and pepper until everything is fully integrated and frothy.
Stir in the chopped spinach, diced bell pepper, halved cherry tomatoes, shredded cheese, and chopped green onions into the egg mixture. Mix gently to ensure even distribution.
Generously spray a muffin tin with olive oil to generously coat the cavities and prevent your muffins from sticking.
Carefully pour the egg mixture into the muffin tin, filling each cavity approximately 3/4 full to give the muffins room to rise beautifully.
Place the muffin tin in your preheated oven and bake for 18-20 minutes. You’ll know they’re ready when they have puffed up and a toothpick inserted in the middle comes out clean.
Once baked, remove the muffin tin from the oven, allowing the muffins to cool in the tin for about 5 minutes. Then, gently run a knife around the edges of each muffin before transferring them to a wire rack to cool completely.
Enjoy these delightful snacks warm right out of the oven! Alternatively, store them in an airtight container in the refrigerator for up to a week. They reheat wonderfully in the microwave for a quick and satisfying breakfast!
Notes
These muffins can be stored in an airtight container in the refrigerator for up to a week.