Iced Lime Parfait

Method

• step 1

  In a pan, boil the lime juice and zest to reduce by 3/4. Cool

• step 2

  Put the egg yolks, sugar and reduced lime juice in a heatproof bowl over a pan of simmering water. Whisk until the mixture is thick, light and at least doubled in volume

• step 3

  Remove from the heat and continue to whisk until the mixture cools to room temperature.

• step 4

  Fold in the cream and Marsala

• step 5

  Whisk the egg whites until they can form stiff peaks. Fold into the mixture. Spoon the mixture into glasses and leave to set in the freezer for at least 2 hours