Vegans, I need your help! (romantic restaurant suggestions)

I live out of town but am visiting a vegan who I am falling in love with, and want to take her somewhere romantic on her birthday! Unfortunately, a friend of hers told me that she has already booked a night at The Acorn around the same time, which was my top option.

Ideas I've found from research direct me primarily to Meet on Main, but idk if it's particularly romantic? Doesn't need to be overly so, I just don't want a place that's too casual "pub" vibes. Any other good suggestions?

Thank you!