Mustard Mayonnaise

• 4 egg yolks, at room temperature
• 1 teaspoon Dijon-style mustard
• Salt and freshly milled pepper

Place the egg yolks, mustard, salt, pepper, dry mustard, and cayenne in the bowl of a mixer or food processor and beat at high speed for 2 minutes, or until the mixture is creamy.

In a thin stream, gradually add the oils, beating all the while.

Add the lemon juice and adjust the seasonings to taste. Add the boiling water and mix for 2 to 3 seconds, just until incorporated.