Within an hour I can be at the ocean, the forest, the mountains in San Francisco...But really, I fell in love with the city the first time I came out here in 2003. In addition to the natural beauty, this is ground zero for the food justice movement.

I'm in San Francisco because of the energy, the ideas, and the fact that this is a great place for me to land. When I'm traveling and working nationally, I love coming back here.

What makes the farmers market such a special place is that you are actually creating community around food.

Food historian Jessica B. Harris says African American cuisine is simply what black people ate. When I think about what my family ate, we ate what people think of as soul food on special occasions, on holidays, but our typical diet was leafy greens and nutrients and tubers - food that was as fresh as being harvested right before our meal. Whatever was in season, that's what we were eating. It was being harvested right from our backyard.

In fact, I don't advocate any particular diet for anyone. I think that's a very personal decision that people have to make. I will say this, however: There are more and more studies in terms of the health benefits of veganism; there are more and more studies that are showing that a properly executed vegan diet is highly beneficial for cleansing, for detoxing, in addition to lowering the risks for and even ameliorating chronic illness. We all have our own body constitutions and cultural food ways and personal tastes that determine what will work for us.

I grew up in Memphis, Tennessee; I went to college in New Orleans before moving to New York City for graduate school. Both sets of my grandparents grew up in rural Mississippi and brought a lot of agrarian knowledge to Memphis, which is an urban center in the South. Both sets had amazing backyard gardens. My paternal grandfather, practically every inch of available space was green.

The thing that I think about most often is the loss of biodiversity. We talk about these food issues so often with concern to historically excluded communities, but I'm concerned with everyone having access to healthy foods. Consumers across the board are being robbed of biodiversity.