1Heat oven to 375. spray a 8" square pan w/ cooking spray. In lg bowl, combine flour, sugar, baking powder and salt. In another bowl, beat egg, milk and butter. Stir milkmix into flour mix, just until moistened. Pour into pan and top w/ strawberries. In small bowl, combine 1/2 cup flour,1/2 cup sugar. Cut in butter until crumbly, stir in walnuts. Sprinkle over strawberries. Bake 30-35 min, or until toothpick inserted in center comes out clean. Cut into squares. Serve warm.