Fresh Watermelon with Cool Citrus Mascarpone

1 medium watermelon

1 cup mascarpone cheese

1 orange, zested and segmented -- juices set aside

2 lemons, zested and segmented -- juices set aside

1 grapefruit, zested and segmented -- juices set aside

2 tablespoons sugar

Cut watermelon in half lengthwise. Using a melon baller, cut into balls and place in a shallow serving bowl.

In a blender, mix the mascarpone and the citrus fruit juices and the sugar until smooth. If too thick, thin with a little water (it should be as thick as yogurt). Drizzle the mascarpone over the watermelon balls and sprinkle the fruit segments over and serve cool.