Using a food processor or a hand mixer, pulse 1 can of beans with egg, panko, and seasoning until a coarse purée is formed. Transfer mixture to a medium bowl; stir in remaining can of beans and cilantro. Divide mixture into 8 to 10 portions; ball lightly and flatten into patties. Place on platter, cover with plastic wrap and refrigerate before cooking for at least one hour. Heat small amount of oil in a nonstick skillet over medium-high heat. Cook burgers until warmed through with crisp, lightly browned exteriors, turning once; about 6 to 9 minutes.