After Thanksgiving Casserole

After Thanksgiving Casserole
2 (5 ounce) cans boned chicken or turkey, or equal amount leftovers
1 (10.5 ounce) can condensed cream of chicken soup
1 (6 serving size) package chicken flavor stuffing mix
1/2 Onion, diced
3-4 Celery stalks, diced
Olive oil
3 Cups mashed potatoes, prepared
1 Cup frozen vegetables (optional)
Make mashed potatoes your normal way. Combine poultry, soup and vegetables in a bowl. Sauté onion and celery in olive oil until soft. Prepare stuffing mix on top of range or in microwave according to package directions, add onion and celery; place in baking dish. Spread mashed potatoes over stuffing. Top with soup mixture and cook in preheated 350 degrees oven for 20 minutes.