extra-virgin olive oil, plus more for brushing
boneless skinless chicken breasts, cut into 1" pieces
Kosher salt
Freshly ground black pepper
All-purpose flour, for dough
pizza dough, at room temperature
barbecue sauce, plus more for drizzling
shredded cheddar
shredded fontina
small red onion, thinly sliced
Ranch dressing, for drizzling
Freshly chopped chives, for garnish