Ingredients: For the Streusel Topping: 3 tablespoons all-purpose flour 1 ½ tablespoons unsalted butter, cold and cut into cubes 1 ½ tablespoons light brown sugar 2 teaspoons granulated sugar 1/4 teaspoon ground cinnamon (or pumpkin pie spice) pinch salt 1 ½ tablespoons diced apples…