From My Carolina Kitchen
1 cup mayonnaise, preferably homemade
6 tablespoons white wine
2 tablespoons shallots, finely chopped
4 tablespoons fresh tarragon, finely chopped
2 teaspoons lemon juice
Kosher salt and freshly ground black pepper to taste
Place the mayonnaise in a mixing bowl and set aside. Combine the wine, shallots and 2 tablespoons of tarragon in a saucepan. Boil until reduced by half. Cool. Add this mixture to the mayonnaise, along with the lemon juice, and the other 2 tablespoons of tarragon. Add salt & pepper. Chill thoroughly and serve.
Entertaining with Taste by Peter Coe – yield 1 cup