- 1 tablespoon dry mustard
 - 1 tablespoon boiling water
 - 1 cup mayonnaise
 - 2 tablespoons fresh lemon juice
 - 1 1/2 tablespoons Dijon mustard
 - 1 tablespoon prepared horseradish
 - 2 pounds cooked crab legs, shells removed
 
- Place dry mustard in medium bowl. Add 1 tablespoon boiling water and stir to form paste. Cool. Whisk in mayonnaise, lemon juice, Dijon mustard and horseradish. Season to taste with salt and pepper. Serve sauce with crab legs.