In large non-stick skillet, brown beef on medium-high. Add egg substitute, stirring occasionally to scramble. Add mushrooms and ginger; cook 3-5 minutes. Add cabbage, green onions, and soy sauce; cover and cook until cabbage wilts, 2-3 minutes. Stir to mix. Microwave tortillas until warm. Spread plum sauce down center of tortilla; top with Moo Shu filling, and roll up. Makes 8 servings.