Place the buns on a flat surface and slice the buns all together.
Put the bottom part of the buns in a 9x13 aluminum baking tray.
Layer ham and cheese on top of the buns, then place the top layer of buns over the cheese.
Mix up the dressing by combining the melted butter, mayonnaise, Dijon mustard, Worcestershire sauce, poppy seeds, honey, and dried onion in a small bowl.
Spread the dressing mixture over the top of the buns.
Cover the tray with two layers of aluminum foil and store in the freezer until you’re ready to eat.
Cooking Instructions:
Allow the sandwiches to thaw completely.
Preheat the oven to 350° and bake for 20 minutes, until the buns are toasted and the cheese is melted.
Slice the buns to cut the sliders. Pull the sandwiches apart out of the tray and serve.