method
1. Peel the zest from the grapefruit, oranges and lemon and place in a basin.
2. Pour over the boiling water and leave until cool.
3. Squeeze the juice from all the fruit and place in the refrigerator.
4. Place the sugar in a saucepan, add the cold water and heat gently until the sugar has dissolved. increase the heat and boil rapidly for 1 - 2 minutes.
5. Strain the water from the fruit zest and stir into the chilled fruit juice.
6. Add the warm syrup and freeze for about 3 hours, stirring from time to time until a 'slushy' consistency is obtained.
7. Whisk the egg whites and cream of tartar until peaking and fold through the half-frozen fruit mixture.
8. Return to the freezer for several hours or overnight.
9. To serve, scoop into serving glasses and garnish with sprigs of mint.
serving amount
serves 6
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