Combine all ingredients into a food processor, and process until smooth and free from lumps. (I have a mini food processor perfect for this quantity, but you can try a magic bullet (tall cup) or blender if you don;t have a processor). Pour into 4 serving glasses, and serve with strawberries, extra chopped mangoes, greek yoghurt, or extra coconut! Alternatively, if using fresh mangoes at room temperature (not pre-chilled) leave the mixture to cool in the refrigerator for about an hour or so, until chilled.