Beat eggs together in a small bowl. Add salt and pepper to taste.
Spray a large pan with Frylight and place over a medium heat. Wait until Frylight is clear and add onion, mushrooms and tomatoes to the pan and cook for about 5 minutes. Add spinach to the skillet and keep stirring for a few minutes until just wilted.
Pour in the egg mixture. As eggs set, lift the edges, letting uncooked egg mixture flow underneath. Cook until set, about 10 minutes.