Oh my god I would be so distressed about that gift going to waste. That was so kind of you!

Serious Eats has a vegan dessert list, which looks like mostly ice creams, but some baked fruit things too; most of my vegan dishes are not Thanksgiving-y, alas (pasta e fagioli with a mushroom broth, chana masala, that kind of thing), but maybe a miso risotto?