01 - Fill a medium saucepan with about 2 inches of water and bring to a gentle simmer over medium heat.
02 - In a large, heatproof bowl, whisk together egg yolks and sugar until pale and slightly thickened, approximately 2 minutes.
03 - Place the bowl over the simmering water, ensuring the bottom does not touch the water surface.
04 - Gradually pour in Marsala wine while whisking constantly to prevent curdling.
05 - Continue whisking vigorously for 8 to 10 minutes until the mixture triples in volume and forms thick, soft ribbons when the whisk is lifted.
06 - Remove from heat and portion into individual dessert glasses or bowls while warm.
07 - Top with fresh berries or serve alongside ladyfingers or biscotti if desired.