Burger King Corp.’s introduction of the Impossible Whopper, a plant-based alternative to its famed burger, has been hailed an innovative and profitable way of providing vegan and vegetarian consumers a seat at the fast food table.

But one Georgia vegan claims this is too good to be true. He alleges the Impossible Whopper is cooked on the same grills as meat patties, “thus covering the outside of the Impossible Whopper’s meat-free patties with meat by-product.”