Add the turkey carcass and bone broth to a slow cooker (or Dutch oven).
Cook on high for 2 hours or until the meat easily falls off the bones. (If using a Dutch oven, bring to a boil and simmer, cover with a lid).
Dice the celery stalks. Slice the carrots diagonally into 1/2-inch thick slices. Slice the onion into 1 to 2-inch pieces. Add these veggies to a bowl and set aside.
Cut the potatoes into 1 to 2-inch cubes, add into a separate bowl and set aside.
Pull the meat off the turkey and remove the carcass, bones, and skin. (If you're cooking in a Dutch oven and notice a lot of the stock evaporated, you can add a bit more or even water).
Add potatoes cook for about 30 minutes or until almost done. (If using a Dutch oven, bring heat back up to medium).
Add the carrots, celery, and onion and continue to cook for 1 hour or until the potatoes and veggies are done. (If using a slow cooker, this will be shorter, about 10 to 20 minutes).
Add salt and pepper to taste.