Preheat oven to 350°. Place 2 cups flour and salt in a food processor; pulse until blended. Add 1 cup butter; pulse until butter is the size of peas. While pulsing, add just enough ice water to form moist crumbs. Press mixture into a greased 13x9-in. baking pan. Bake 20-25 minutes or until edges are lightly browned. Cool on a wire rack.
In a large bowl, combine apples, 1 cup sugar and cinnamon; toss to coat. Spoon over crust. Place remaining flour, butter and sugar in food processor; pulse until coarse crumbs form. Sprinkle over apples. Bake 60-70 minutes or until golden brown and apples are tender. Cool completely on a wire rack. Cut into bars. Yield: 2 dozen.