Horseradish Mayonnaise

• 1 egg yolk
• 1 tablespoon imported mustard such as Dijon
• 1 tablespoon white-wine vinegar
• Salt to taste, if desired
• Freshly ground pepper to taste
• 1 cup corn, peanut or vegetable oil
• 3 tablespoons horseradish, preferably freshly grated

1. Put the egg yolk, mustard, vinegar, salt and pepper in a mixing bowl.
2. Start beating briskly with a wire whisk and gradually add the oil until all of it is added.
3. Stir in the horseradish.

egg yolk, imported mustard, whitewine vinegar, salt, freshly ground pepper, corn, horseradish

Taken from cooking.nytimes.com/recipes/2155 (may not work)