From Wikipedia:

"Zabaglione is an Italian dessert  or dressing made with egg yolks, sugar,  a sweet liquor (usually Marsala wine), and sometimes one of cream, mascarpone, or whole eggs. It is a very light custard, which has been whipped to incorporate a large amount of air. Zabaglione is traditionally served with fresh figs and is sometimes also spelled sabayon, while its real Italian name is zabaione (or zabajone, which is an archaic form). It is also popular in Argentina, where it is known as sambayón. In Colombia, it's known as sabajón. In Venezuela, a related egg-based dessert drink is called ponche de crema."

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I used in this dressing with srawberries : 4 egg yolks, 5 tbs  powdered sugar, juice from 2 limes and peel of a half, 4 tbs dry white wine (didn't have any Marsala ) Put these ingredients all to the same heat resistant (steel)bowl. Put a kettle on. Whisk and whisk the ingredients above the boiling water heating it untill it's ready. Be careful not to boil it, otherwise it will turn to a scrumbled eggs. You need to whisk it also when the dressing is cooling.

sorry, the colour of this text won't change in spite of my "orders".