Filling: Sauté celery & carrot in a bit of oil 2–3 min. Add turkey; cook till just opaque. Fold in pumpkin, herbs/spices, salt/pepper, (cranberries/pepitas if using), then the cooled gravy. Taste and adjust. Chill—cool filling = crisp pastry.
3 Assemble: Cut 6" rounds. Add ~⅓ cup filling, fold, crimp. Vent, egg-wash.
4 Bake: 400°F for 25–30 min to deep golden.
5 Serve with quick Cranberry-Dijon dip: ½ cup cranberry sauce + 1 Tbsp Dijon + 1 tsp cider vinegar, whisked. Or make a small batch turkey gravy from your stock.