Sauce bigarade is a traditional sauce that’s also known as orange sauce. It’s made from the cooking juices or deglazed pan leftovers of duck with Seville orange and lemon juice. The sauce is finished with a julienne of blanched orange and lemon zest.

In France, the term a la bigarade refers to dishes served with this orange sauce, and it should always be prepared with Seville oranges, if available. Sauce bigarade is traditionally served with grilled duck breasts or roasted duck.