Preheat broiler. Spread cut surface of rolls with Parkay. Lightly toast under broiler.
Meanwhile, stir together mayonnaise and mustard in small bowl; spread on toasted sides of rolls. Top each roll half with 1 ounce ham, 3 slices tomato and 1-1/4 slices cheese (enough to cover tomatoes).
Place sandwiches under broiler, 3 to 4 inches from heat. Broil until cheese melts and starts to bubble.