Baked Ham and Cheese Sliders

Ingredients

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• cooking spray (such as Crisco®)
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• ½ cup butter
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• 1 onion, minced
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• 3 tablespoons Dijon mustard
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• 1 tablespoon poppy seeds
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• 2 teaspoons Worcestershire sauce, or more to taste
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• 1 (12 count) package Hawaiian sweet rolls, split, or more as needed
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• 1 pound sliced deli ham, or more as needed
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• 8 slices Swiss cheese, or more as needed
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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.