Heat oven to 400˚F. Line a rimmed baking sheet with foil. Place beans in large bowl; mash well with a fork or potato masher. Stir in potatoes, egg, ¾ cup bread crumbs, Cajun seasoning, sesame seeds, salt and pepper. Form mixture into 4 patties.
Place remaining ½ cup bread crumbs in a shallow dish; carefully coat veggie patties. Place on prepared baking sheet; drizzle with oil.
Bake 20 minutes, until crisp and lightly browned.