Okay, I'll bite (if you'll excuse the pun).
Gluten-free communion wafers for vegans is hilarious. You'd figure that someone who's going to think enough about what they eat to become a vegan might have an issue with a religion that wants them to eat something that they're not only allergic to, but which goes against everything they believe about food.
Sure, Jesus, I'll eat your flesh and blood! Just hold the gluten, please.