1. Prepare rolls and baking dish. Slice the entire block of rolls in half without separating the rolls. Remove the top half of the Hawaiian rolls and set aside. Place the bottom half of rolls in a 9×12 baking pan, lightly greased with butter.
2. Add ham and cheese. Layer each roll with a slice of ham and a half slice of cheese.
3. Prepare and add buttery topping. In a microwavable bowl, cover and heat butter for about 30 seconds or until melted. Stir in Dijon mustard, Worcestershire sauce, onion powder, and poppy seeds.
4. Add the top layer of rolls and brush with the butter-poppy seed mixture.
5. Bake. Loosely cover with foil and bake at 350°F (175°C) for about 15 minutes.
6. Remove foil and bake an additional 5 minutes or until cheese is melted and tops of buns are golden brown.
Serve hot and enjoy your delicious Ham and Cheese Hawaiian Roll Sliders!
