Shred meat and return to sauce for ease of serving, or place drumsticks on a platter. Serve over rice or with corn tortillas. To prepare the dish stovetop, simmer in a Dutch oven 4 hours or until meat pulls away from the bones.
Combine orange juice, 1/4 cup lime juice, and turkey; refrigerate 30 minutes. Remove turkey from marinade; discard marinade. Pat turkey dry.
While turkey marinates, heat a large skillet over medium-high heat. Add chiles; toast 2 to 3 minutes or until lightly charred. Cool slightly. Remove and discard stems; keep seeds.
Bring stock to a simmer in a large saucepan over medium heat. Add plantain, chiles, and pecans; simmer 20 minutes or until chiles are very soft.
Reduce heat to low. Add chocolate, stirring to prevent scorching. Add oregano, salt, and cumin; simmer 10 minutes.
Pour sauce into a blender. Remove center piece of blender lid (to allow steam to escape); secure lid on blender. Place a towel over opening in lid. Blend until smooth.
Heat skillet over medium-high heat. Coat pan with cooking spray. Add turkey; cook 10 minutes, browning on all sides.
Scatter celery, garlic, and onion in a 6-quart slow cooker. Top with turkey and sauce; cover and cook on LOW for 5 hours or until meat is very tender.
Remove turkey. Shred meat; discard bones and skin. Stir meat, remaining lime juice, and sugar, if desired, into sauce. Top with cilantro and radishes.
MyRecipes is working with Let's Move!, the Partnership for a Healthier America, and USDA's MyPlate to give anyone looking for healthier options access to a trove of recipes that will help them create healthy, tasty plates. For more information about creating a healthy plate, visit www.choosemyplate.gov.