Preheat oven to 350. Cover a baking sheet with aluminum foil.

Brown the ground beef over medium heat in a large skillet until crumbly, drain off and discard grease. Add in onion soup mix and enough water get it mixed. Cook until absorbed. Remove from heat. Stir the mayonnaise and cheddar cheese into the ground beef mixture.

Split rolls and lay the bottoms on the prepared baking sheet. Spread the cheese and beef mixture on the bottom half of each roll. (If you want pickles, place a few on top of the the beef mixture.) Replace the tops of rolls.

Cover with another sheet of aluminum foil. Bake until the sliders are heated through and cheese melts, about 30 minutes.