Cut Bell Pepper Into Thin Strips. Trim Fat From Round Steak. Cut Beef Into 2" X 1/8" Strips, Across The Grain. Mix Teriyaki Sauce, Lemon Juice, Cornstarch And Gingerroot In A Square Microwave Dish, 8 X 8 X 2 Inches. Stir In Beef. Cover And Refrigerate For At Least 20 Minutes. Drain Beef, Reserving Marinade. Stir Broccoli, Onion, And Garlic Into Beef. Cover Dish And Microwave On High For 6 To 8 Minutes. Stir After 4 Minutes. Cook Until Beef Is No Longer Pink. Stir In Bell Pepper And Marinade. Cover And Microwave 2 To 3 Minutes Or Until Sauce Is Slightly Thickened. Serve With Hot Cooked Rice.