Ham-Swiss Cheese Buns(Power Level: Low, 30% And High, 100%)  
["1/2 c. butter or margarine", "1/4 c. grated onion", "1/4 c. prepared mustard", "1 Tbsp. poppy seed", "6 large sandwich buns", "12 slices boiled ham", "6 slices Swiss cheese", "1 medium tomato, sliced", "1 c. catsup", "1/4 c. finely chopped onion", "1/4 c. brown sugar", "2 Tbsp. lemon juice", "2 tsp. Worcestershire sauce", "1/4 tsp. pepper", "1/4 tsp. chili powder", "1/4 tsp. onion salt", "dash of hot pepper sauce", "dash of garlic powder", "2 c. shredded cooked roast beef or chipped ham", "6 large sandwich buns"]
["Mix all ingredients except meat and buns in a 1-quart casserole.", "Microwave on High (100%) for 2 to 3 1/2 minutes or until boiling.", "Stir occasionally."]
["butter", "onion", "prepared mustard", "poppy seed", "sandwich buns", "ham", "Swiss cheese", "tomato", "catsup", "onion", "brown sugar", "lemon juice", "Worcestershire sauce", "pepper", "chili powder", "onion salt", "pepper sauce", "garlic", "beef", "sandwich buns"]