The fun part about the wine country is sampling all of the locally grow food the comes from these regions. Many of the restaurants in these regions are supplied daily from the farms all around the countryside. From organic farm produced products, world class produce, cheese, meat, poultry and the list goes on. Gay Area Wine Tours website has a number of great restaurants listed by region for you to research if you would like to book a reservation while on a wine tour.
There are world famous restaurants to that great mom and pop that people in the area will recommend.