hi there,
The Culinary Institute in St Helena is a great place to learn about food, diverse cultural cooking, baking traditions, and also, you can learn new techniques at a cooking demo.
Also, the
Culinary Institute in
St Helena is also home to the excellent Greystone Wine Spectator restaurant, which highlights California cuisine.
Another great place is the downtown Napa farmers market where you can sample great food in Napa. The market is held on Tuesdays and Saturdays.