I believe this recipe started out as one my mother got from a church friend. It quickly became a holiday family favorite, as well as an easy to prepare pot-luck dish that our family lovingly refers to as "Squish Casserole". Over the years, the recipe has evolved into what I've posted here... a pinch of this... a dollop of that. This is an easy one that is hard to mess up and fun to doctor up with your own ideas. Enjoy!
Using a large pot with enough salted water to cover, bring squash, onion, & carrots to a boil. Simmer until squash is tender. (Don't let squash get mushy.) Drain all very well using a large colander.
Transfer squash mixture either back to empty pot or a large mixing bowl. Add cream of chicken soup, sour cream, & shredded cheese, and stir until well combined. You cheese lovers out there can add more shredded cheese here. I like sharp cheddar, but you can vary here as you desire.
Squash can get watery when cooked, so I like to stir in about a heaping cup (or so) of the herb stuffing to absorb some of the "juiciness". It also adds flavor to the mixture. (My sister sometimes adds a beaten egg to hold it all together, but I haven't found it necessary.)
Melt your stick of butter in a saucepan and add the remainder of the bag of stuffing mix. Stir until the butter evenly coats the stuffing.
Spread squash mixture into a greased 2-Qt. casserole dish and top with buttered stuffing mix. Bake at 350 degrees for 25-30 minutes, until bubbly and top is lightly browned. Remove from oven and enjoy! Serves a crowd--especially if you added larger amounts of squash, cheese, or stuffing.