Morningstar Grillers Prime are a good choice in terms of a very general-tasting veggie burger. They are made primarily of wheat gluten and soy protein, rather than vegetables. The patties can be dressed up with basic sauces like ketchup, hot sauce or barbecue sauce, and taste best on a roll with lettuce.
The Gardenburger Original is another veggie-burger classic. These small patties are low in calories and fat, and made up of mushrooms, onions, cooked brown rice and some cheeses. These taste good on a roll with sliced avocado and alfalfa sprouts.