- 4 large egg yolks
- 1/4 cup plus 1 teaspoon sugar
- 1/3 cup St-Germain liqueur (see Note)
- 1 teaspoon freshly squeezed lemon juice
- 1/2 cup heavy cream
- 2 pounds mixed fresh berries, such as blackberries, raspberries, blueberries and sliced strawberries
- In a large heatproof bowl set over a pot of simmering water, whisk the egg yolks with the 1/4 cup of sugar, the liqueur and lemon juice over moderate heat until thick and pale and an instant-read thermometer inserted into the mixture registers 155°, about 7 minutes. Remove the bowl from the saucepan and let the sabayon cool.
- In a large bowl, using a handheld electric mixer, whip the heavy cream until firm. Fold the whipped cream into the sabayon and refrigerate until chilled, about 1 hour. In another bowl, toss the berries with the remaining 1 teaspoon of sugar and let stand for 10 minutes. Spoon the berries into bowls, top with the sabayon and serve.
The elderflower sabayon can be refrigerated for up to 6 hours.
St-Germain elderflower liqueur is available at many liquor stores or online from klwines.com.