Continuing a theme raised in our fireside chats, Preston is an OB/GYN in The Permanente Medical Group. But he’s here because of his other heath passion which is to help ordinary people eat better food. Preston is the inspiration behind Kaiser Permanente’s Farmers’ markets, which he started in 2003. There are now 30 weekly markets bringing fresh, locally grown and raised produce to people living near Kaiser facilities in 7 states. Preston also writes the Farmers Market Recipes blog which includes recipes and how-to videos about healthy cooking. But he’s no TV celebrity chef—for Preston this is all about the practicalities of how to help people cook, use knives correctly, and purchase good food cheaply. He’ll be challenging the Health 2.0 crowd today to help in that effort.