Preheat oven to 400 degrees F. Spray a muffing tin with non-stick spray. Chop up the fully cooked turkey sausage and divide between the muffin cups. Set aside.
Combine the whole eggs, egg whites, cottage cheese, 1/4 cup of cheddar cheese, salt, pepper, garlic powder and onion powder in a blender and process until smooth, should only take a few pulses.
Add in a handful of baby spinach and pulse a few more times to chop up into egg mixture. Pour egg mixture into muffin cups, filling about 3/4 of the way full. Top each egg cup with cheddar cheese and carefully place in the oven.
Bake for 12-15 minutes, until the eggs are set. Let cool slightly before removing. Once cooled completely, you can store in the fridge for up to 7 days.