Baked ham & cheese party sandwiches

These tasty little sandwiches are very easy to put together. You can serve them warm or cold.
Original recipe found here.

Ingredients:

• 3/4 cup melted butter
  1 1/2 tbsp dijon mustard
  1 1/2 tsp worcestershire sauce
  1 1/2 tbs poppy seeds
  1 tbs dried minced onion
  24 mini sandwich rolls
  1 lb cooked deli ham, sliced
  1 Lb swiss cheese, sliced
  
  
  Directions:
  1. Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.
  
  
  2. In a bowl, mix together butter, Dijon mustard, Worcestershire sauce, poppy seeds, and dried onion. Separate the tops from bottoms of the rolls, and place the bottom pieces into the prepared baking dish. Layer about half the ham onto the rolls. Arrange the Swiss cheese over the ham, and top with remaining ham slices in a layer. Place the tops of the rolls onto the sandwiches. Pour the mustard mixture evenly over the rolls.
  3. Bake in the preheated oven until the rolls are lightly browned and the cheese has melted, about 20 minutes. Slice into individual rolls through the ham and cheese layers to serve.
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