1. Spray circular metal pan with a non-stick grease/spray.
2. Pour egg beaters into dish.
3. Sprinkle mushrooms, onions, peppers, and ham throughout egg beater mixture.
4. Place in the preheated oven, and set to the above settings.
5. Once timer ends, remove from oven, work omelet away from the dish with a spatula and fold in half.
6. Sprinkle shredded cheese over the top evenly and allow it to melt.