Do Ahead Chicken Casserole

Title: Do Ahead Chicken Casserole
Categories: Chicken, Casserole
Yield: 4 servings

2 c Cooked, diced chicken
1/2 c Mayo
1 c (or small can) sliced olives
1 c Sour cream
4 oz Can sliced mushrooms
12 sl Thin white bread, trimmed
1/2 c Chopped onions, sauted -and cubed

Mix all ingredients together, place in 9x13 pan. Refrigerate overnight. Bake at 300 for an hour. Serves 4 to 6.