Slice one apple finely and put the slices aside. Wash the remaining apples and quarter them. Peel and core the citrus fruits and the lemon and put them together with the apples into the mixers. Put a part of the juice into a pot, add the gelatine and stir until it dissolves. Add the remaining juice and as much sugar as you like. Pour the whole into an ice cube form and put it into the freezer until the juice hardens. Whisk the egg white until stiff, take the form out of the freezer and whisk the content until fluffy. Add the colouring and the nutmeg and mix the whole with the whisked egg white. Put the mixture again into the freezer until the cream hardens, but is not frozen. Take the mixture with a spoon out of the form and put it into a bowl. Put the apple slices on top of the mousse before serving it. back