Preheat the oven to 350 degrees. In a large skillet add the olive oil and onion. Sauté until tender. Add in the ground beef and cook and crumble until no longer pink.
Add in the salt, pepper, garlic, and steak sauce.
Slice the dinner rolls in half and lay in a 9x13 inch dish. Lay a single layer of cheese on top of the rolls.
Spread the beef mixture on top of the cheese.
Add another layer of cheese and top with the rolls.
Spread the melted butter and sesame seeds on top of the rolls. Bake for 20-25 minutes or until golden brown.