Egg White Omelette

Spray a 7- inch nonstick skillet with nonstick cooking spray. Heat over medium heat until hot but not smoking. Add spinach, mushroom , green onion, and tomato. Cook until the spinach is wilted and the vegetables are heated through, 1 to 2 minutes. Transfer to small bowl and keep warm.
Wipe the skillet clean with paper towel and spray again with nonstick cooking spray. Heat over medium heat till hot. Add the egg whites and season with salt and pepper. Use a rubber spatula to lift up the cooked egg whites from edges go pan and let the uncooked white flow beneath, until the omelet is still moist and just set on top. 1 1//2 to 2 minutes. Spread the vegetables down the center, the use the spatula to fold the omelet in half. Serve on a warm plate