Tangerine-Lemon Mousseline

1. 1

   Combine tangerine and lemon juices in a bowl. Whisk egg yolks and water in a heatproof bowl, and place over a pan of simmering water. Whisk until mixture foams and begins to thicken, 1 minute. Add half the citrus juice. Cook, whisking, until thickened slightly.

2. 2

   Puree yolk mixture, remaining citrus juice, the zest, vinegar, 1/4 teaspoon salt, and the cayenne in a blender. Reduce speed to low, and add butter in a slow, steady stream. Whip the cream until it forms stiff peaks, then fold it into 1 pint Hollandaise sauce. Serve right away.

* Per serving · 4 servings · Values may vary.