Defrost the strawberries. Puree with 150 ml water and mix with syrup. Pour into a wide bowl or onto a tray and freeze in the freezer for at least 3 hours. In the meantime, cut open the vanilla pod and scrape out the pulp. Mix pulp, sugar, wine and egg yolks.
Whisk over a warm water bath until frothy and make a zabaglione. Chill the zabaglione immediately. Remove the granite and leave in the refrigerator for about 10 minutes. Stir the zabaglione. Scrape off the granite with a sturdy spoon, put the zabaglione into pre-cooled glasses and serve immediately.
3 1/4 hours waiting time