All you need is a carton of egg whites, fresh spinach, and cheese ( I used a 5 cheese blend).
I chopped up some of the spinach bunch:
Then, in a small bowl I mixed the whole carton of egg whites with the spinach and cheese:
The tops will become a little browned when they are done:
These came out great and are great for a quick breakfast or snack! So, I just stored them in some Tupperware for the week: