1. Combine ingredients for sauce. Marinate beef in 1/4 cup sauce 5 minutes. Heat 1 tablespoon oil in large skillet or wok over high heat. Stir-fry beef in batches 5 minutes or until browned.
2. Add peppers; cook 2 minutes. Add remaining sauce; stir-fry until sauce thickens. Serve over hot cooked ramen noodles or rice, if desired.
Quick 'n' Tangy Beef Stir-Fry
