Preheat oven to 350°F. Line a 13 x 9-inch baking pan with aluminum foil and spray very lightly with cooking spray.
Remove rolls from package without separating them and slice in half horizontally with a serrated knife (making one giant rectangular hamburger bun). Place bottom portion of rolls in the bottom of the pan.
Layer ham slices and cheese evenly over rolls. Pour barbecue sauce over the cheese and top each with a pickle slice. Then place the top portion of the rolls on top.
Pour melted butter over tops of rolls, coating each one. Sprinkle with garlic powder. Garnish with sesame seeds.
Cover rolls with tented foil (don’t let the foil touch the tops of the rolland bake for 15 minutes. Remove foil and continue baking for 10 more minutes.
Remove from oven and let rest 5 minutes. Remove rolls from pan and slice into single servings.