Prepare marinade as diredcted on envelope. Marinate beef as directed on envelope; drain well. Cover and microwave onion and margarine in 2-qt casserole on high (100%) 1 minute. Stir in bouquet sauce, tomatoes, and thyme. Mix in beef. Cover and microwave 8 minutes; stir. Microwave on medium (50%) 10 minutes. Shake flour and wine in tightly covered container. Stir into meat Mixture. Add pepper strips and mushrooms; mix into sauce. Cover and microwave until meat is tender, 6 to 8 minutes. Serve over hot Rice.