First Step: Prepare the Muffin Tin

1. Preheat the Oven: Start by preheating your oven to 350°F (175°C). Grease a 12-cup muffin tin with non-stick cooking spray or line with silicone muffin liners. This will prevent the egg muffins from sticking and ensure they come out easily once baked.
2. Prepare the Veggies: Dice the bell pepper, onion, and any other vegetables you want to include. You can also sauté them lightly in a pan to soften them before adding them to the muffins, but this step is optional.

Second Step: Make the Egg Mixture

1. Whisk the Eggs: In a large bowl, crack the eggs and whisk them together until well beaten. Add the milk, garlic powder, oregano, salt, and pepper, and whisk again until everything is fully combined. The milk helps to create a fluffier texture and makes the muffins more moist.
2. Add the Veggies: Add the diced spinach, bell pepper, onion, and any other vegetables you’re using to the egg mixture. Stir them in gently, making sure everything is evenly distributed.
3. Add the Cheese: Stir in your choice of shredded cheese. Cheddar, mozzarella, or feta work especially well in egg muffins, providing a creamy texture when melted. The cheese also helps bind the ingredients together.
4. Add Optional Protein: If you’re using bacon, sausage, or any other protein, add it to the egg mixture now. Stir until everything is well combined. For a vegetarian version, you can skip this step or add plant-based sausage alternatives.

Third Step: Fill the Muffin Tin

1. Pour the Egg Mixture: Carefully pour the egg mixture into the prepared muffin tin, filling each cup about ¾ of the way full. You want the muffins to have enough room to rise as they bake but not overflow.
2. Top with Extra Cheese or Toppings: If desired, sprinkle a bit of extra shredded cheese or fresh herbs on top of each muffin for added flavor and color.

Fourth Step: Bake the Muffins

1. Bake the Muffins: Place the muffin tin in the preheated oven and bake for 18-20 minutes, or until the egg muffins are puffed up, golden brown on top, and fully set in the center. You can check doneness by inserting a toothpick or knife into the center of a muffin—it should come out clean when they’re ready.
2. Cool and Serve: Once the muffins are done, remove them from the oven and let them cool for a few minutes before removing them from the tin. Serve immediately, or allow them to cool completely before storing.