Yes. To make a crunchy streusel topping, use 7 tablespoons of cold butter, ⅓ cup light brown sugar, ⅓ cup of flour (all-purpose flour or almond flour), and ½ teaspoon of cinnamon. With clean hands, a fork, or a pastry tool, combine the ingredients until you have a crumble consistency. Sprinkle the streusel on top of the casserole before baking.