For an extra layer of flavor, consider adding sauteed mushrooms or crumbled Italian sausage to the corn mixture. If you don't have fresh corn, you can use frozen corn kernels. Thaw them completely and pat them dry before adding them to the skillet. The stuffing can be assembled ahead of time and stored in the refrigerator for up to 24 hours before baking. Add an extra 10-15 minutes to the baking time if baking from cold. Be careful not to burn the butter when frying the sage leaves. Watch it closely and remove it from the heat as soon as the butter is lightly browned.