Combine green pepper, onion, butter and frozen mixed vegetables in a 3 quart casserole. Cover with plastic wrap. Microwave at high (100%) 8 minutes, stirring half way through the cooking time. Stir in remaining ingredients. Microwave at high (1 00%) until bubbly and heated through, 5 to 7 minutes. Serve over hot rice or noodles. Makes 6 servings.