Gym Shoe or Jim Shoe is a traditional sandwich originating from Chicago. In order to prepare it, any kind of bread (often Italian roll, hoagie, or sub) is filled with shaved gyro meat (usually lamb), roast beef, corned beef, lettuce, tomatoes, tzatziki, sometimes mayonnaise and mustard, followed by onions, Swiss cheese, sweet bell peppers, and giardiniera (a spicy Italian relish).