Preheat oven to 350 degrees. In large mixing bowl, cream margarine and sugar until light and fluffy. Add egg and beat until well mixed. Stir in flour. Pat dough into 13 x 9 inch pan. Spread jam evenly on top. In a small bowl combine topping ingredients; carefully spread over jam. Bake 25 minutes. Cool. Cut into 2 x 1 inch bars. ----