Preheat your oven to 350 degrees. Spray a silicone muffin pan with olive oil or avocado oil spray. Set on top of a rimmed baking sheet and set aside while you prep the filling.
In a medium sauté pan, heat the avocado oil over medium high heat. Add both the leeks and sausage and sauté for about 10 minutes until caramelized. Set aside.
Chop up the spinach and well drained peppers, set aside.
In a blender, combine the eggs, cottage cheese, feta, salt and pepper and blend for 30 seconds until the mixture is smooth.
To fill your muffin pans, evenly distribute the sausage mixture then the spinach and red peppers to each cup. Fill each muffin pan with the egg mixture.
Place the baking sheet on the middle rack in the oven. Before closing the door, fill the baking sheet with hot water until reaching about 1/2 way up the muffin pan. I use the hottest water setting from my sink.
Bake for 35 minutes. Carefully remove from the oven and let the egg bites cool for about 10 minutes before removing from the molds.