Say hello to the beginning of autumn with this apple and butternut squash crumble that is simply full of seasonal flavors. Diced apples and squash are tossed with cinnamon and topped with a buttery brown sugar crumble topping and baked to golden brown perfection. Ready in an hour, the end result is a caramelized filling with a crunchy buttery topping that will pair well with your favorite ice cream or custard.