Ingredients

• cooking spray , such as Crisco®
• 0.5 cups butter
• 1 onion , minced
• 3 tablespoons Dijon mustard
• 1 tablespoon poppy seeds
• 2 teaspoons Worcestershire sauce , or more to taste
• 1 , 12 count
• 1 pound sliced deli ham , or more as needed
• 8 slices Swiss cheese , or more as needed

Instructions

1. 1 Gather all ingredients. Preheat the oven to 350 degrees F (175 degrees C). Spray a 9x13-inch baking dish with cooking spray.
2. 2 Melt butter in a saucepan over medium-low heat; cook and stir onion in the melted butter until softened, 5 to 10 minutes. Add mustard, poppy seeds, and Worcestershire sauce; cook and stir for 5 minutes.
3. 3 Arrange the roll bottoms in the prepared baking dish. Spoon 2/3 of the onion mixture over top.
4. 4 Add ham and cheese to each roll.
5. 5 Place the roll tops over the cheese layer, then brush the remaining onion mixture over top.
6. 6 Cover the dish with aluminum foil.
7. 7 Bake in the preheated oven for 15 minutes. Remove aluminum foil and bake until the roll tops are lightly browned, 5 to 10 minutes.

Nutrition per serving