ripe plantains, about 3 to 3 1/4 pounds, vegetable oil, ground beef (preferably ground round) or ground turkey, adobo seasoning blend, sazón flavoring blend, store-bought or homemade, optional, small white onion, minced (about 1 cup), green bell pepper, minced (about 1 cup), recaito flavoring base (store-bought or homemade), or 2 tablespoons chopped cilantro, pimiento-stuffed green olives, sliced, capers, dried orégano, tomato sauce