Combine apple, 1/4 cup orange juice and cinnamon in a medium bowl, stir well and set aside. Combine remaining 1/4 cup orange juice and milk, stir well and set aside. Gradually add 1-cup sugar and margarine. Continue mixing until light and fluffy. Add egg substitute and vanilla and beat well. Combine flour, baking powder and salt and mix well. Gradually add flour mixture to creamed mixture alternately with the milk and orange juice mixture.

Pour half the batter into a 10-inch tube pan (bundt-type pan) sprayed with nonstick cooking spray. Top with half of the apple mixture and then the remaining batter. Top with the remaining apple mixture and sprinke with brown sugar. Bake at 350 degrees for 1 hour and 10 minutes. Cool on a wire rack for 10 minutes then remove from pan and continue to cool.