The Patty Melt is a sandwich that features a plant-based patty made from soy and potato proteins. It is served on a toasted marble rye bread with garlic aioli, caramelized bourbon onions, and a cheese-like substance that melts over the sandwich. This vegan sandwich is a popular item at a restaurant that specializes in plant-based cuisine. Some customers have reported that it is a tasty and satisfying meal, while others find it to be a bit too greasy. Overall, the Patty Melt is a sandwich that is worth trying for those who are looking for a hearty and filling vegan option.