Thanksgiving is a food-centric, hedonistic, gustatory orgy. We gather and we eat for upwards of four hours, all the way from pre-dinner snacks to post-dessert dessert. But a traditional Thanksgiving dinner is literally one of the most allergen-laden meals possible. Whether this is your first allergen-free Thanksgiving or your twentieth, the following tips will help make it festive, mouthwateringly delicious, and safe.