Badische Weinsuppe Recipe - Traditional German Wine Soup from Baden

Ingredients

• 2 cups dry Riesling wine
• 1 cup chicken stock
• 1/2 cup heavy cream
• 2 tablespoons unsalted butter
• 1 small shallot, finely minced
• 1/2 teaspoon lemon zest
• 1/2 vanilla bean, split and seeds scraped
• 1/4 teaspoon ground white pepper
• 1/4 teaspoon freshly grated nutmeg
• 2 egg yolks
• 1 tablespoon sugar
• Pinch of fine sea salt
• 1 tablespoon all-purpose flour
• 1/2 cup whipped cream (for garnish)
• Chives, finely sliced (for garnish)
• Croutons, butter-fried (for garnish)