I'm sure if you asked, you could get a vegetarian plate. I remember there being pasta & shrimp. I think the other option was chicken. We went for my dd's b-day last March.
on the website i think it does mention vegetarian being an option. You probably have to let them know. It says vegetarian and child menu's avail. but it does not say what the actual menu is.
Let's see, we were there in July, I had a yummy salad, chicken and veggies and something else but I can't remember what. They had choices for kids too, my girls had chicken strips. I think they do have a vegetarian option but you may want to call them to make sure. Have fun, we had a great time in July!