Here's one vegetarian burger the whole family will love! You'll even forget that they're healthy for you. Packed with 7 grams of protein and only 210 calories each, these satisfying burgers are sure to be a hit. Hearty patties packed with black beans, quinoa,  sweet potatoes and topped with melty swiss cheese all piled on top of a toasted bun. We tried these burgers topped with ketchup and barbecue sauce.