Preheat & Prep the Baking Sheet: Set the oven to 375°F and line a rimmed baking sheet with parchment paper.
Form & Bake the Burger Patty: In a mixing bowl, combine the ground beef, salt, garlic powder, and black pepper. Mix by hand until well combined. Spread the beef mixture into a large rectangle, slightly larger than the 12-pack of rolls, on the prepared baking sheet. Bake for about 12 minutes or until firm to the touch.
Prepare the Burger Sauce: In a small bowl, mix the mayonnaise, relish, ketchup, mustard, and a pinch of salt to create the burger sauce.
Slice the Rolls: Using a serrated knife, slice the entire pack of rolls crosswise to create a single top and bottom piece. Try to keep the cuts as even as possible.
Assemble the Sliders: Place the bottom section of the rolls on a clean piece of parchment paper. Evenly spread the burger sauce across the cut surface. Arrange 4 slices of cheese over the sauce, tearing them if needed for an even layer.
Layer the Burger Patty: Once the burger patty is fully cooked, remove it from the oven but keep the oven on. Use paper towels to blot any excess grease, then transfer the patty onto the layer of cheese. Discard the used parchment paper from the baking sheet and wipe away any remaining grease.
Finish Assembling: Add the remaining 4 slices of cheese on top of the burger patty, then sprinkle the crushed potato chips over it. Place the top half of the rolls over everything to complete the slider assembly.
Bake & Serve: Carefully lift the parchment paper to transfer the entire assembled mega-slider back onto the baking sheet. Cover it loosely with foil and bake for 10 minutes. Then, remove the foil and bake for another 2 minutes until the cheese is fully melted and the bun tops are lightly golden. Let the sliders cool for a few minutes before slicing and serving.