Combine together all fruit, water & butter in a saucepan, and bring to boil. Reduce heat and simmer gently for 5 minutes. Leave to cool. When cool, add sifted dry ingredients. Mix in jam if preferred. Spray pan with non stick spray. Spread mixture into the pan & bake in moderate oven for 45 minutes. Leave to cool for 5 minutes before turning out onto rack.
—Maria Zamperoni