Where's the YA Love for Vegetarians?

I've mentioned this before, but I'm a lacto-ovo-vegetarian. I'll eat dairy products, but I don't eat any meat or seafood, for ethical reasons. I realized today that there aren't a lot of YA books featuring main characters who are vegetarian or vegan. (It probably belongs in my Find the Gap series). Not sure why this is, since teens who are vegetarians really aren't that rare...are they?

Here are a few books that came to mind that do feature veggie-loving protagonists:

The Princess Diaries series by Meg Cabot — Mia is a vegetarian princess who often crusades for animal rights (although she does give in to carnivorous urges upon occasion).
Vegan Virgin Valentine by Carolyn Mackler — well, the title speaks for itself! She's recently turned vegan (partly for reasons involving a guy) and dreams of grilled cheese sandwiches.

Truth or Dairy by Catherine Clark — I read this one years ago and don't remember it very well, but the main character is, according to the Goodreads description, a "would-be vegetarian."

Do you guys have any more recommendations? I'd love to find some more books with main characters who are vegetarians or vegans; on a personal level it makes them just that much more relatable for me.