Lightly spray a 9 x 13-inch baking dish or pan with cooking spray. Cut rolls in half and place bottom halves in prepared dish. Layer meats and cheese over the bottom half.
Drizzle the creamy Italian dressing over the meat and cheese. Replace top half of rolls and push the rolls together tightly. Whisk together the poppy seeds, mustard, melted butter, garlic powder, and Worcestershire sauce. Pour sauce over the tops of rolls and use pastry brush to spread evenly.
Cover with foil and let sit for 10 minutes. Bake at 400 until cheese is melted, 7-8 minutes. Remove foil and cook an additional 2 minutes until tops are lightly browned. You can also turn on the broiler just long enough to brown lightly. Serve warm.