Yuzu is an extremely sour Japanese citrus fruit that is most often combined with soy sauce as a dip for fried foods, particularly dumplings. We find that the brightness of the yuzu makes it work well as a pan sauce for seared chicken breasts. This sauce can also be used as a dip for fried chicken wings.
Heat the oil in a small sauté pan over medium heat.
Add the shallot and sauté until translucent, about 2 to 3 minutes.
Add the grated ginger and sauté for 1 minute more.
Add the sake and stir well with a wooden spoon, until most of the sake evaporates from the pan and about 1 tablespoon (15 ml) is left, about 2 to 3 minutes.
Add the yuzu juice and soy sauce and simmer until the mixture is reduced by half, about 2 to 3 minutes.
Add the chicken stock and mix well.
Simmer for 8 to 9 minutes or until the mixture is reduced by half and the mixture is thick enough to lightly coat the back of a spoon.
Season with the white pepper.
Add the butter and stir until melted.
Serve as a sauce to accompany chicken or fish or as a dipping sauce for dumplings.