i second volpi. i drive through petaluma often because it's between my farm and orchard. so petaluma is often the break i need in the 2 hour drive. petaluma can be a tad twee these days..but still good food. you can tell ingredients are super fresh and local.

also: della fottaria http://dellafattoria.com/ and petaluma creamery https://www.springhillcheese.com/

and my fav deli ray's delicatessen and tavern..https://www.rays-deli.com/history ...local breweries too.