I'm a vegetarian too! Here's what I normally eat in a day, I hope it helps. I try to eat small portions of protein and/or veggies and fruits every three hours or so to keep my metabolism revved up.
Breakfast: Fruit smoothie (frozen berries, POM juice, banana, etc)
Lunch: A salad with nuts and dried fruit in it, or sliced veggies with hummus
Dinner: Veggie soup, salad with protein (like beans), or a veggie omelet
For snacks, fruit, nuts, carrots with hummus etc
I drink green tea constantly too.