Spray 10-12" non-stick skillet with olive oil cooking spray.
Over medium heat, pour eggs into skillet with salt and pepper. Add chopped tomato, mushrooms and spinach evenly over liquid eggs.
Allow eggs to cook until completely set, about 5 minutes.
Gently fold the sides of the egg in toward the middle or fold in half. Drizzle with Sriracha sauce for a little kick.
Notes
Mix it up with your favorite vegetables or breakfast meats such as bacon, sausage or ham. Stuff the omelet differently every time to give yourself a fresh taste every morning.