For streusel topping, in a food processor bowl, combine the 1/3 cup flour, the rolled oats, 1/4 cup sliced almonds, 1/4 cup butter, 2 tablespoons granulated sugar, 2 tablespoons brown sugar, the cinnamon, 3/4 teaspoon nutmeg, and 1/4 teaspoon salt. Process until mixture is evenly crumbly. (Or, chop almonds. In a medium bowl, combine almonds, flour, oats, granulated and brown sugars, cinnamon, nutmeg, and salt. Using a pastry blender, cut in 1/4 cup butter until the mixture is crumbly.) Set aside.