Chef Jeremy Fox turns vegetables into true expressions of seasonal flavors at Rustic Canyon, Julia Sherman documents artists making salads in “Salad for President,” and Deborah Madison shares meatless meal tips. Then Laura Avery shops for spring veggies at the market while we get a peek at Stacy Michelson’s design for KCRW’s “Good Food” tote bag. Plus: Jonathan Gold digs into the Redneck Platter at Manuela.