Fill a large pot that has a flat-bottomed steamer insert with water and bring it to a boil. Arrange the rolls in the steamer, put the hot dogs in the boiling water, and cover with the steamer and lid. Cook until the hot dogs are heated through and the rolls are warm and soft, about 5 minutes. Be careful not to over steam the rolls as they can become soggy.
While the dogs are cooking, cut the onion into 6 smaller pieces, put them into a food processor, and pulse until they are finely chopped. Remove the onions to a bowl and do the same with the cabbage. Crush the potato chips into very fine pieces.
Remove a roll from the steamer. Put a hot dog into it and top with some onion, cabbage, and crushed chips. Squirt on some mayonnaise, mustard, and ketchup and enjoy!