Spray or grease a small {1 or 1 1/2 quart} baking dish add onion, celery and butter. Microwave on high for 3-4 minutes, covered with a paper towel, until butter melts and vegetables have softened.

Stir in corn.

Top with dry stuffing mix and pour chicken broth over all. Stir well to combine. Add a little more broth if dressing seems dry. Stir in egg for a denser dressing. Refrigerate at this point for baking later if desired.

Bake covered at 350 degrees for 30 minutes. Uncover and return dish to oven until dressing is heated through. If dressing is cold add a few more minutes to cooking time.