Preheat oven to 350 degrees F and lightly grease a 9×13" baking dish.
Using a serrated knife, slice the entire block horizontally through the middle so you have one large top half and one large bottom half. DO NOT SEPERATE THE ROLLS
Place the bottom half in your prepared baking dish.
Layer the ham evenly across the bottom half of the rolls. Fold each slice rather than laying it flat.
Lay the cheese slices on top of the ham.
Melt the butter in a microwave-safe bowl. Whisk in the Dijon mustard, Worcestershire sauce, garlic powder, and poppy seeds (and brown sugar if using) until fully combined.
Place the top half of the rolls back onto the cheese layer
Brush the warm glaze generously over the entire top surface, letting it run down the sides.
Cover the dish tightly with foil and bake for 15 minutes.
Remove the foil and bake for another 5 minutes until the tops are golden brown and the cheese is fully melted.
Rest for two minutes, then slice along the roll lines and serve straight from the pan.
Enjoy
