Food & Cooking Recipes Lunch Recipes Grainy Mustard Aioli 2.6 (23) By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on May 16, 2017 Print Share Share Tweet Pin Email Prep Time: 10 mins Total Time: 10 mins Yield: 1 cup This cold sauce fuses mayonnaise with mustard, resulting in a condiment that can be used with many dishes. Ingredients 1 tablespoon plus 1 teaspoon Dijon mustard 1 large egg yolk 2 teaspoons fresh lemon juice Coarse salt and freshly ground pepper ½ cup olive oil 2 tablespoons grainy mustard 2 teaspoons prepared horseradish 1 tablespoon water, plus more if needed Directions Whisk together Dijon mustard,egg yolk, lemon juice, 1/4 teaspoonsalt, and 1/8 teaspoonpepper in a bowl. Pour inoil in a slow, steady stream,whisking constantly untilemulsified and thick. Whiskin grainy mustard, horseradish,and water. (Thin withmore water if too thick.) Cook's Notes Food safety note: The egg in this recipe is not cooked. Print