TOPPING: In large bowl, combine flour, sugar, baking powder, baking soda and salt. Using fingers or two knives, cut in margarine until mixture resembles small peas. With fork, stir in buttermilk just until soft dough forms. Drop by tablespoonfuls in dozen mounds on top of hot fruit filling. Bake in 200ºC (200C) oven 25 minutes or until topping is golden brown and has risen.