Food in the San Francisco Bay Area or the Bay Area for short ("the Bay" as known to locals) is a wealthy basket of world cuisine.
The food listed here are:
-available in a restaurant or fast food service (truck or counter service)
-in any of the 9 Bay Area counties
(San Francisco, Alameda, San Mateo, Contra Costa, Santa Clara, Napa, Sonoma, Solano and Marin)
-available for take out
Source: my personal local knowledge having tried most of this list (and having googled the names of the food of which I was less familiar), word of mouth, Yelp, Google Maps