It does not matter whether you call this a keto breakfast quiche or a keto breakfast muffin – or by any other name. It is one of the most tasty, nutritious and satisfying (and have I mentioned easy?) breakfasts you can make. Spinach, red bell pepper, and feta cheese combine perfectly together for you to prep ahead. Now you can enjoy breakfast even on those busy mornings when you have to have something to take with you, as you run out the door.