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½
Easy
By David Tanis
Published 2013
This mustard sauce is good with raw, smoked, or grilled fish or with cold chicken or sliced avocados.
Put the crème fraîche in a bowl and stir in the mustard, cayenne, sugar, horseradish, and lemon zest. Season to taste with salt and pepper. Chill for 30 minutes to let the flavors infuse.