Hot Colby Ham Sandwiches

1/2 cup butter, melted
2 tablespoons prepared mustard
1 tablespoon dried minced onion
1 tablespoon poppy seeds
2 to 3 teaspoons sugar
15 dinner rolls (about 3-inch diameter), sliced
15 slices Colby cheese
15 thin slices deli ham (about 1 pound)
2 cups (8 ounces) shredded mozzarella cheese

In a small bowl, combine the butter, mustard, onion, poppy seeds and sugar. Place roll bottoms, cut side up, in an ungreased 15-in. x 10-in. x 1-in. baking pan. Top each with Colby cheese, ham and mozzarella. Drizzle with half of the butter mixture. Replace roll tops. Drizzle with remaining butter mixture. Bake, uncovered, at 350° for 10-15 minutes or until cheese is melted. Yield: 15 servings.

Here are instructions from another recipe that calls for similar sandwiches to be wrapped individually in foil.... Bake at 350° for 6-10 minutes or until cheese is melted, or freeze for up to 2 months.To use frozen sandwiches: Bake at 350° for 30-35 minutes or until cheese is melted.

Yield: 8 servings.