Special Occasion Tuna Casserole

2 cup stuffing mix
1 can (13 oz.) tuna
1 can cream of mushroom soup
2 cup finely chopped celery
½ cup Miracle Whip
1 cup sour cream
1 tbsp. lemon juice
8 oz. sliced water chestnuts
1 cup sliced mushrooms
½ cup onion, chopped
½ cup green pepper, chopped
1 tsp. salt
1 tsp. pepper
1 tsp. garlic powder
1 cup grated Cheddar cheese

Combine 1-½ cups stuffing mix and remaining ingredients except cheese in 9x13 inch baking dish. Top with cheese. Bake at 350 degrees for 30 minutes.