Chef DJ Olsen is always at the Santa Monica farmers market. He's the chef at Lou, the wine bar on Vine (724 Vine St.). He's using the huge variety of potatoes in many different dishes, including roasted, smashed and in a potato tart. The recipe for his potato tart is here.
Juan Asavedo is one of the sellers of Zuckerman Farms asparagus. They bring jumbo asparagus to over 20 markets in the LA-are. Pictures of there stand are here.