Cut beef across grain into thin strips. Combine next 4 ingredients; stir in beef. Let stand 15 minutes. Stir-fry half of beef in 1 tablespoons hot oil in wok or large skillet over high heat 1 minute; remove. Repeat cooking procedure with remaining beef and 1 tablespoons oil; remove. Heat remaining 1 tablespoon oil in same pan. Add whites of green onions, garlic, ginger and red pepper; stir-fry 1 minute. Stir in green onion tops. Add beef and Mongolian Sauce. Cook, stirring, until sauce boils and thickens. Sprinkle with sesame seed before serving.
*Mongolian Sauce: Combine 1/3 cup water, 1 tablespoon sugar, 1/2 teaspoon cornstarch, 2-1/2 tablespoons Kikkoman Soy Sauce, 1 tablespoon dry sherry and 1 teaspoon Kikkoman Hoisin Sauce.