Preheat your oven to 350°F (175°C).
Spray your muffin tin with non-stick spray or line each cup with muffin liners.
In a mixing bowl, combine the 5 egg whites and 2 large eggs. Whisk them together until fully blended.
Pour in the 1/4 cup of skim milk or almond milk, and season with salt and pepper to taste. Whisk until smooth.
Add the chopped green onion, fresh kale, roasted red peppers, and crumbled feta cheese to the egg mixture. Gently fold in.
Evenly distribute the egg mixture among the muffin cups, filling each about 3/4 full.
Place the muffin tin in the preheated oven and bake for 20-25 minutes or until the tops are golden.
Once baked, remove the muffin tin from the oven and let it cool for a few minutes before removing the muffins.
