At its most basic, a fine, quick dessert that can be made at the last minute with three ingredients you undoubtedly have in the house—bananas, butter, and brown sugar. At its most complex, this becomes a four-star dessert of smooth, creamy banana and coconut cream in a crisp spring roll. In between, we do bananas with a caramel sauce, bananas with a kind of cashew brittle, and bananas with French toast, this last a brilliant brunch dish.