This week, we celebrate teachers with three teacher guests! First up, the flavors of the Amalfi coast bloom at a cozy pizzeria in Danville: Locanda Ravello. Next, Oakland’s Cafe Umami is the perfect spot for nourishing grain bowls crafted by a former microbiologist and brimming with fermented flavor. The final course: seasonal and sophisticated offerings at Walnut Creek’s welcoming Main Street Kitchen.