Strawberry or Raspberry Water Ice

Recipe from Good Things by Jane Grigson

Put the fruit through a blender
Make a syrup of the sugar and 1/2 cup water
When it is cool add the puree and strain
Flavor to taste with lemon juice
Dilute with the extra water if required
Pour into a container, stirring the frozen sides of the mixture into the more liquid middle part every so often. With shallow trays this needs to be done every half hour; deep boxes can be left longer
In 2-3 hours, the time depends on the depth of the mixture, you will have a thick mush of iced granules, called a granita
In 3-4 hours you will have a firm but not impenetrable block of water ice ready to be turned into sorbet
Beat the egg whites in a large bowl until they're stiff
Add spoonfuls of ice gradually, if properly done the mixture blow up to a mass of white foam
Refreeze in a larger container until the sorbet has the consistency of firm snow
Add the liqueur gradually at the end during the last stirring; with the sorbet add when ice and beaten egg white are mixed together