Preheat oven to 400°. Lightly grease 8-inch square pan. Sift flour, salt and cinnamon into bowl. Stir in brown sugar and oats. Cut in butter until mixture is crumbly. Add nuts. Press 1/2 of mixture evenly over bottom of pan. Bake at 400° 5 minutes. Cool on wire rack. Mix sugar, cornstarch and relish in saucepan. Cook slowly, stirring constantly, until mixture thickens and boils 3 minutes. Pour mixture over oats in square pan and top evenly with remaining oats. Bake at 400° 30 minutes or until golden brown.