TUONG GOI CUON (HUE-STYLE PEANUT DIPPING SAUCE)

Steps:

• Combine the hoisin sauce, water, bean sauce, vinegar, onions, and sugar in a pan over moderate heat and simmer until the onions are soft, about 15 minutes. Add the peanut butter and stir well. The sauce should be just thick enough to coat a spoon. If it is too thick, add a little water. Set aside to cool.
• When serving, transfer to an individual sauce bowl and garnish with chili paste and chopped peanuts. This sauce will keep up to two weeks if refrigerated.