Preheat oven: Preheat your oven to 350°F (175°C). Grease a baking dish.

Assemble the sandwiches: Slice the Hawaiian rolls in half without separating them, and place the bottom half in the prepared baking dish. Layer with ham and Swiss cheese, then place the top half of the rolls on top.

Make the sauce: In a small bowl, mix melted butter, Dijon mustard, honey, poppy seeds (if using), and garlic powder. Pour the sauce evenly over the top of the sandwiches.

Bake: Cover with foil and bake for 15-20 minutes, or until the cheese is melted and the sandwiches are warm.

Serve: Slice and enjoy these delicious, savory Hawaiian Ham and Cheese Sandwiches!

Perfect for a quick dinner or party appetizer!