Making Spinach Feta Egg Muffins is straightforward and enjoyable. Just follow these steps for a delicious outcome:

1. Preheat Oven: Start by preheating your oven to 350°F (175°C). This gives it time to reach the right temperature for baking.
2. Prepare Muffin Tin: Lightly grease a muffin tin with cooking spray or olive oil to prevent sticking.
3. Sauté Vegetables: In a skillet over medium heat, add a teaspoon of olive oil. Sauté the chopped onion and minced garlic until they are softened, about 3-4 minutes. This step enhances the flavors of the muffins.
4. Whisk Eggs: In a large mixing bowl, crack the eggs and whisk them until they are well beaten. Pour in the milk and mix until combined.
5. Mix Ingredients: Add the chopped spinach, sautéed onion and garlic, crumbled feta cheese, salt, pepper, and oregano into the egg mixture. Stir gently until all ingredients are combined.
6. Fill Muffin Tin: Pour the egg mixture evenly into the prepared muffin tin, filling each cup about ¾ full.
7. Bake: Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until the muffins are set and lightly golden on top.
8. Cool: Allow the muffins to cool in the tin for about 5 minutes. Then, transfer them to a wire rack to cool completely.
9. Store: If you’re not eating them immediately, store the muffins in an airtight container in the refrigerator for up to a week. You can also freeze them for longer storage.

Enjoy the delightful aromas wafting through your kitchen as you prepare these incredible muffins!