My favorite is Sunflower Cafe in Fair Oaks, California! All of the food is organic, vegetarian or vegan. My favorites are the Nutburger and the Patty Melt!
Here is a copycat recipe for the nut burger patties which can be made either vegan or vegetarian (omit the egg for flour or flax eggs & use vegan cheese).
You will need a food processor and a juicer is useful to get the carrot pulp.
The patty melt also uses the nut burger patty, except it is served on sliced wheat bread, with sliced tomatoes, carmelised onion, Dijon and whole grain mustard, vegan cheese, and vegan mayo. It should be fried on the pan after the sand which is assembled so that the bread is crispy and the cheese is melted.