Squash Casserole

2 cups squash
1 medium onion, chopped
2 carrots, grated or chopped
1 stick butter, melted
1 can cream of mushroom soup
Salt & pepper to taste
Cheese (1/4 - 1 cup)
1/2 package herb dressing mix
1 cup sour cream

Cook and drain squash, onion, and carrots. Mix sour cream, soup, cheese, salt and pepper in cooked mixture. Mix butter in dressing. Place 1/2 dressing in bottom of deep casserole dish then squash mixture, remainder of dressing on top. Bake 30 minutes at 350. Serves 8.