Instructions: Put half the water in a saucepan, whisk in the skimmed milk and then add the marzipan in pieces. Set over a low heat and stir occasionally until the marzipan has melted. Remove from the heat.

Grate on a little nutmeg, stir in the liqueur (if using) then add the remaining water. Cool the liquid and then freeze it, in a sorbetiere, ice cream maker or in a plastic box in the ice-making compartment of your freezer. If using the latter method, stir from time to time.

Allow the ice to set before serving it.

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