I'm a vegetarian living in Hollywood. My favorite place is Kitchen 24 on Cahuenga. Everything there is solid, and they have a great happy hour and tons of veggie options. If you wanted unhealthy vegan food there's Doomie's on Vine; if you want amazing and cheap Indian food there's India Sweets & Spices on Los Feliz; and 25 Degrees at the Roosevelt is fun and has good veggie burgers. And for raw food there's Lifefood Organic on Cahuenga. Have fun and enjoy!