A classic Japanese condiment, Ponzu Sauce is a citrus-based sauce with a tart-tangy flavor similar to a vinaigrette. It contains a mix of ponzu (citrus juice of sudachi, yuzu, and kabosu and vinegar), soy sauce, sugar or mirin, and dashi.

• ½ cup soy sauce
• ½ cup citrus juice (a mixture of lemon, orange, and/or grapefruit juices)
• zest from one lemon
• 2 Tbsp mirin (or substitute 2 tsp sugar + 2 Tbsp sake or water)
• ½ cup katsuobushi (dried bonito flakes) (packed; for vegan/vegetarian, omit or substitute 1–2 dried shiitake mushrooms)
• 1 piece kombu (dried kelp) (2 x 3 inches, 5 x 7.6 cm, 6 g per piece)