Heat small non-stick pan to medium, add oil. Shake the egg white container well and add the egg whites to the pan. Salt/pepper to taste. Let the egg cook/set up till mostly cooked and turn heat down to med low. Add cheese, then the two slices of turkey, covering the egg white completely. Then add spinach to one side of the omelette and carefully flip the other side over to the spinach side. Let cook on low another 5 mins till eggs are not running and spinach is wilted. Slice Roma tomato along side and top with salt/pepper to taste.