Guy Fieri hands four of the best all-star chefs the ultimate vegetarian challenge: Make two unforgettable vegetarian dishes in one hour using no more than 15 ingredients. After delivering their appetizer midway through the hour, the chefs learn they must also incorporate exactly 1.5 pounds of an additional ingredient into their fine dining dish. After the judges score the impressive meatless dishes, the winning all-star gets a shot at claiming up to $20,000.