Any vegetarian mommies-to-be?

I need a bit of help. I've been a vegetarian most of my life, but I've always struggled with the snack aspect. It was no big deal until I became pregnant. Now, I am starving all the time (even after I eat a meal), and I can't figure out good, filling, healthy snacks to take on-the-go. Any suggestions? I try to avoid dairy, as I'm lactose intolerant. Advice is appreciated!