Yuzu is an incredibly aromatic citrus fruit from East Asia that tastes like a cross between a lemon and a mandarin orange. Used in both sweet and savory applications, yuzu makes everything taste more special, and its elegant flavor works beautifully with this creamy and light no-bake cheesecake. It can be difficult to find fresh yuzu fruit in the US, since it is not commercially grown and import of the citrus is banned, so bottled yuzu juice is the next best option.