Created by Puppitypup on November 15, 2014
Step 1: Combine all ingredients in a bowl except oil and parmesan.
Step 2: Whisk until smooth.
Step 3: Add oil in a thin stream, whisking continually. Continue whisking until well incorporated.
Step 4: Taste and adjust seasoning.
Step 5: Stir in parmesan, cover and refrigerate until ready to use.