Preheat oven to 350*. In medium bowl, combine flour and sugars; cut in margarine until crumbly. Stir in nuts. Reserving 1 cup crumb mixture, press remainder firmly on bottom and halfway up sides of 12 x 7 inch baking dish. In large mixer bowl, combine remaining ingredients except reserved crumb mixture; mix well. Pour into prepared dish. Top with reserved crumb mixture. Bake 55 minutes or until golden. Cool. Serve with ice cream if desired. REfrigerate leftovers. ......Debbie Holland, entered 1994