Preheat the oven to 350°F (175°C). Grease a 9x13-inch baking dish with non-stick cooking spray.
In a small bowl, whisk together the melted butter, honey mustard, Worcestershire sauce, poppy seeds, and dried onion flakes until well combined.
½ cup melted butter, 1 tablespoon honey mustard, 1 ½ teaspoons Worcestershire sauce, 1 tablespoon poppy seeds, 1 tablespoon dried minced onion
Without separating the rolls, slice the entire slab horizontally to create a top and bottom layer. Place the bottom layer of rolls in the prepared baking dish.
8 Hawaiian rolls
Layer half of the sliced cheese over the bottom layer of rolls, followed by the sliced ham, and top with the remaining sliced cheese.
16 thinly sliced Swiss Cheese, 16 thinly sliced cooked deli Ham
Place the top layer of rolls over the cheese and ham.
Using a pastry brush or spoon, evenly brush or pour the butter mixture over the tops of the rolls, allowing the mixture to drip down the sides.
Bake in the preheated oven for 15 minutes until the rolls are lightly golden brown and the cheese is melted.
Remove the baking dish from the oven and let it cool for 5 minutes.
Using a sharp knife or a pizza cutter, carefully slice through the rolls, separating them into individual sliders.
Serve the ham and cheese sliders warm, and enjoy!