if you go through gilroy, hit up one of the roadside stands for some garlic ice cream. if you havne't had it, it's worth trying at least once in your lifetime.
also, not too far from gilroy is casa de fruita. they've got all kinds of fruit and veggies, tons of nuts in all kinds of flavors, jelly beans, chocolate, and hot sauces/relishes. it's one of my favorite places to stop.