01 - Preheat the oven to 350°F. Grease a 12-cup muffin tin or line with silicone muffin liners.
02 - In a large bowl, whisk together eggs and milk until smooth and fully combined.
03 - Add chopped spinach, green onions, feta, mozzarella or cheddar, salt, pepper, garlic powder, and nutmeg. Mix thoroughly to distribute all ingredients evenly.
04 - Pour or ladle the mixture evenly into the muffin tin cups, filling each about ⅔ full to allow for rising.
05 - Bake for 18–20 minutes, or until the egg bites are set and lightly golden on top.
06 - Let cool in the tin for 5 minutes, then run a knife around each bite and gently remove. Serve warm or at room temperature.