Preheat oven to 350 degrees F (180 degrees C).
Coat a 9x13 baking dish with cooking spray. Line the bottom of a pan with the bottom halves of the Hawaiian Roll (24).
Top with the Black Forest Ham (1 pound).
Top with Provolone Cheese (20 slice).
Spread the Cream Cheese (8 ounce) onto the bottoms of the sweet roll tops and place them in a layer on top of the cheese.
In a medium bowl, combine the Butter (1/2 cup), Yellow Mustard (1 tablespoon), Worcestershire Sauce (1 tablespoon), Dried Onions (2 tablespoon), and Parmesan Cheese (1/4 cup).
Mix well and pour evenly over tops of the sandwiches. Sprinkle the Poppy Seeds (2 tablespoon) over the top. Cover with aluminum foil and bake in the preheated oven for 25 minutes, or until warmed through.
Cut at the seams with a knife and serve warm!