Combine the egg yolks, sugar and Marsala in a bowl. Using a whisk, whisk until thoroughly blended. Place the bowl over a pot of simmering water and heat, whisking constantly until the mixture is thick foamy and has reached 165 degrees.
Cool slightly and serve in Martini glasses immediately. Add your fruit at this time.
Wondering what to do with the extra egg whites? Try these recipes - Forgotten cookies or Pavlova