Have you ever tasted a foie gras and jelly doughnut? Jonathan Gold thinks it may be the most delicious doughnut in Los Angeles. Noah Allison takes us on a walking food tour of the best restaurants, bakeries and food stands in Boyle Heights. We continue our look at water in Southern California with Andy Lipkis, who offers tips on capturing rainwater, and Mark Bittman of the New York Times weighs in on the pros and cons of irradiating food. Tamar Adler reminds us how lovely a simple salad can be, and Suvir Saran dishes on chickens, goats and his new farmer lifestyle.