In bowl, cream margarine and powdered sugar until light. Blend in flour. Press evenly over bottom of a 9 x 13 inch pan. Bake at 350 degrees for 12 -16 minutes, until set. Spread jam over hot baked crust. In bowl, beat egg whites until foamy. Continue to beat, adding granulated sugar, 1 Tablespoon at a time until egg whites form soft peaks and are glossy. Fold in 1/2 cup nuts. Spread over jam layer. Sprinkle with remaining nuts and coconut. Bake at 350 degrees. Cool and cut into bars. Makes 24 bars ----