Preheat oven to 450°.
Heat a medium (10-inch) ovenproof skillet coated with cooking spray over medium-high heat. Add Chicken-Vegetable Toss and tomatoes; sauté 2 minutes.
Combine egg substitute, eggs, oregano, salt, and pepper. Add egg mixture to pan; reduce heat to medium, and cook, uncovered, 5 minutes (do not stir). Sprinkle cheese over egg mixture, and place pan in oven. Bake at 450° for 10 minutes or until set. Broil 1 minute or until lightly browned. Cut into 4 wedges; serve immediately.