Cream margarine in a large bowl; gradually add sugar substitute,beating at medium speed until light and fluffy.Add eggs and beat until thick and lemon coloured.Combine flour and baking powder; add to creamed mixture,mixing well.Fold in apple and banana.Spoon batter into a loafpan coated with cooking spray.Bake at 350 for 65 to 70 minutes or until a wooden pick inserted in center comes out clean.LCool in pan 10 minutes; remove from pan,and cool completely on a wire rack. Exchanges: 1 Starch 1 Fat Serving Size: 1 (1/2") slice Per Serving: Calories 123 Fiber 1gm Sodium 142mg Cholesterol 23mg Carbohydrates 21gm Protein 3gm Fat 4gm Typed by G.Major 01\08\96