Pre - heat oven to 350 degrees. Cookie sheet lined with foil.
Place the hamburger and dry onion soup mix in a large bowl, mix together thoroughly.
Place the mixture in a frying pan, cook on medium heat until hamburger is cooked through. Drain the hamburger, you can put the cooked hamburger on paper towels to cool to remove as much fat as possible.
After the hamburger has cooled, place in a bowl, add the mayonnaise and shredded cheese. Mix thoroughly. Line a cookie sheet with foil. Cut the rolls in half, place the bottom portions on the foil. Top with the hamburger mixture, place the tops on and brush generously with the sauce. Place a sheet of foil over the top of the rolls, bake at 350 degrees for about 20 minutes, just until the cheese in the rolls has melted. Serve immediately.