Preheat oven to 350-degrees. Place the filled shells on aluminum foil and pinch the foil together over the top of the filling, sealing them for baking. Bake for 30-40 minutes.
Remove from oven and open the foil carefully and cut through the middle of one half to make sure the meat is done to your liking. If not quite done, reseal, and place back in oven another 10-20 minutes.