BBQ Chicken-and-Black Bean Tacos

olive oil

diced red bell pepper (from 1 bell pepper)

frozen whole kernel sweet corn, thawed

canned unsalted black beans, rinsed and drained

skinless, boneless rotisserie chicken breast, shredded (about 2 1/2 cups)

organic barbecue sauce (such as Annie's)

(6-in.) corn tortillas

plain 2% reduced-fat Greek yogurt

chopped fresh cilantro leaves, plus more for garnish

fresh lime juice

kosher salt