Sauce, Marinade & Dipping, Duck Sauce Sweet & sour. Streit's Duck Sauce is a tangy sweet & sour condiment with the subtle flavor of fruit. It is a great dipping sauce for Egg Rolls, Crispy Noodles, and other fried foods. This Duck Sauce is also a great cook-in sauce for Poultry and Spare Ribs. Look for other quality Streit's products at your favorite grocer.