01 - Rinse collard greens thoroughly under cold running water in several changes. Remove tough stems and chop leaves into bite-sized pieces. Set aside.
02 - In a large pot or Dutch oven, add smoked turkey pieces and chicken broth. Bring to a boil over medium-high heat.
03 - Reduce heat to low, cover the pot, and simmer for 30 minutes to infuse the broth with turkey flavor and begin tenderizing the meat.
04 - Add chopped onion and minced garlic to the pot. Simmer for an additional 10 minutes.
05 - Add the collard greens in batches, stirring until each addition is wilted enough to accommodate more greens.
06 - Stir in apple cider vinegar, hot sauce if using, salt, black pepper, red pepper flakes if using, and sugar. Mix thoroughly to distribute seasonings.
07 - Cover and simmer on low heat for 45 to 60 minutes, or until collard greens are very tender and the flavors have melded.
08 - Remove smoked turkey pieces from the pot. Shred the meat off the bone and return the shredded meat to the pot. Discard bones and skin.
09 - Taste the dish and adjust seasonings as needed. Serve hot with the flavorful pot liquor (broth) spooned over each portion.