Step 1

Preheat oven to 350.

Step 2

Grease a 9x13-inch baking dish.

Step 3

Combine butter, mustard, Worcestershire sauce, brown sugar, poppy seeds, and dried onion?.

Step 4

Slice the rolls to make sandwiches. Remove tops and set aside.

Step 5

Place the bottom pieces into the prepared baking dish.

Step 6

Layer the ham onto the rolls. Top the ham with the Swiss cheese.

Step 7

Place the tops of the rolls onto the sandwiches. Brush or pour the liquid mixture evenly over the rolls.

Step 8

Bake 20 minutes or until the rolls are lightly browned and cheese has melted.

Step 9

Separate into individual sandwiches to serve.