You must thoroughly cook the seitan burgers before eating. Seitan can not be eaten raw and it must reach an internal temperature of 160° F (71°C). Undercooked seitan will be chewy and the texture will not be as meat-like. Cooking these seitan patties on the grill or frying pan alone will not get the internal temperature high enough. You can wrap the burger patties in foil and steam them for 35 minutes instead of baking them if you would like.