Preparation Place the mustard in a mixing bowl or the bowl of an electric mixer. Add the mayonnaise and beat for 1 minute. Add the Worcestershire, A-1, cream, and a pinch of salt and beat until the mixture is well blended and creamy. If you'd like a little more mustardy bite, whisk in 1/2 teaspoon more dry mustard until well blended. Chill the sauce, covered, until serving. Reprinted with permission from Eat at Joe's: The Joe's Stone Crab Restaurant Cookbook, Copyright ©November 1993, Jo Ann Bass and Richard Sax, Clarkson Potter