I had read about this place on happycow, and have eaten here several times. Here's my John's Garden Cafe review.
The cafe and store is located inside a popular shopping plaza. You order the food from the counter and sit outside in the courtyard to eat. It's basically fast food: burgers and sandwiches. We usually get the veggieburger or veggie sandwiches. Vegan options are limited, but the staff will accommodate upon request.
Convenient when visiting the Malibu area or traveling thru.