Excellent Vegetarian (& Vegan & Non-Veggie) Spot
Lettus has a great selection of vegan and vegetarian food. The price is what you'd expect for a popular spot in the marina district, but you certainly get the quality ingredients you pay for.
I recommend the create-your-own-salad which lets you put some inventive creations together (get the goat cheese! but the chicken breast is bland).
They also have an awesome selection of beverages and desserts, so you can stop in for any occassion.