Buttery and delicious party food: ham and cheese sliders with sweet Hawaiian rolls, deli (or leftover holiday) ham, swiss cheese, and a deliciously seasoned buttery topping.
Preheat oven to 350 degrees F. Spray a 9 x 13 pan with cooking spray and set aside.
Using a sharp serrated knife, slice the rolls in half (see pictures in post) while keeping individual rolls intact. Place the bottom half of the rolls in the prepared pan.
Add half of the cheese in an even layer on top of the rolls. Next, add an even layer of ham. Add the remaining cheese in an even layer on top. Add the top half of the rolls.
To a microwave safe bowl, melt the butter. Set aside to to slightly cool. Whisk in the Worcestershire sauce, dijon mustard, poppyseeds, minced onion, and salt and pepper to taste (I add a good pinch of each).
Slowly pour the butter mixture over the rolls. Use a pastry brush or spatula to evenly spread the mixture over the tops. Some of the mixture will pool at the bottom of the rolls which you want to make the bottoms crispy! You don't need to use all the butter mixture, we usually use just over 3/4ths of it.
Cover the rolls with foil and bake covered for 20 minutes. Remove the foil and (watching closely) bake for another 3-5 minutes or until tops are slightly crispy and cheese is melty.
Serve these sliders straight out of the oven!