A great way to use up extra summer squash. I peeled the bumpy outer skin off and removed the seeds. I did not bake this in a 9x13 pan. The first time I baked it in two loaf pans, the second time I made muffins (bake 20 min.)! I also did not add any nutmeg. Line the bottom of a 9x13-inch dish with a layer of ice cream sandwiches. Spread half the whipped topping over the sandwiches. Spoon half the chocolate mixture over that. Top with half the peanuts. Repeat layers. Freeze until firm, at least 1 hour. Cut into squares to serve.