Photo by ep_jhu. Locavore’s Delight Alice Waters finally got her wish last Friday when Michelle Obama and a gaggle of students from Bancroft Elementary picked up shovels and hoes and set about planting an organic vegetable garden on the White House’s South lawn. Waters and other proponents of sustainable food are understandably ecstatic, and White House chefs Cristeta Comerford, Sam Kass, and Bill Yosses are looking forward to whipping up some tasty meals from…