Yuzu is a Japanese citrus fruit with a flavor somewhere between a lemon and a grapefruit that is the basis of Ponzu sauce. Yuzus are about the size of mandarins, but with yellowish-green dimpled skin. The fruit is filled with large inedible seeds, so they’re generally only used for their juice and zest. The yuzu’s mild sourness adds a bright addition to a marinade or salad dressing.
