Apple-Berry Streusel Bars

Ingredients
2-1/2 cups plus 2 tablespoons all-purpose flour, divided
2 cups old-fashioned oats
1-1/4 cups sugar
2 teaspoons baking powder
1 teaspoon ground cinnamon
1 cup butter, melted
3 cups thinly sliced peeled tart apples
1 jar (12 ounces) raspberry preserves
1/2 cup finely chopped walnuts

Directions
In a large bowl, combine 2-1/2 cups flour, oats, sugar, baking powder and cinnamon. Beat in butter just until moistened. Set aside 2 cups for topping. Pat remaining oat mixture into a greased 13-in. x 9-in. baking pan. Bake at 375° for 15 minutes.
In a large bowl, toss apples with remaining flour; stir in the preserves. Spread over hot crust to within 1/2 in. of edges. Combine nuts and reserved oat mixture; sprinkle over fruit mixture.
Bake 30-35 minutes longer or until lightly browned. Cool completely on a wire rack. Cut into bars. Yield: 4 dozen.