Place the turkey carcass in a large stockpot. Add water, onion, carrots, celery, garlic, bay leaf, fresh thyme, fresh rosemary, and a pinch of salt.
1 leftover turkey carcass, 2 carrots, 1 onion, 1 celery stalk, 3 garlic cloves, 2 fresh rosemary sprigs, 4 fresh thyme sprigs, 2 bay leaves, water