Cool Rhubarb Dessert

In a small bowl, combine the flour, butter and walnuts. Press into an ungreased 13 inches x 9 inches x 2 inches baking dish. Bake at 350 degrees for 20-25 minutes or until lightly browned. Cool on a wire rack.

In a large saucepan, combine the sugar, cornstarch, water and rhubarb until blended. Bring to a boil. Reduce heat; simmer, uncovered, for 5 minutes or until rhubarb is tender. Cool; pour over crust. Chill.

In a large mixing bowl, beat cream until thickened. Add confectioners' sugar and beat until soft peaks form. Fold in marshmallows. Spread over rhubarb layer.

In a small bowl, whisk milk and pudding mix for 2 minutes. Let stand 2 minutes or until soft-set. Spread over cream layer; sprinkle with coconut. Cover and refrigerate for 4-5 hours or until set. Remove from the refrigerator 30 minutes before cutting.