01 - Preheat oven to 350°F. Grease a 12-cup muffin tin thoroughly or line with silicone muffin liners.
02 - Crack eggs into a large bowl, add milk, and whisk until completely smooth and frothy.
03 - Add chopped spinach, green onions, crumbled feta, shredded cheese, salt, pepper, garlic powder, and nutmeg. Mix until evenly distributed.
04 - Ladle mixture into prepared muffin tin, filling each cup about two-thirds full to allow for rising.
05 - Bake for 18-20 minutes until egg bites are fully set and lightly golden on top.
06 - Let cool in pan for 5 minutes, then run a knife around edges and gently lift out each bite.