Lime

Take a lime in your hand before you cut it. Squeeze gently. If it gives a little and springs back, it is full of juice. A hard lime, one that feels like a green stone, will be stubborn and stingy — you will have to work for every drop. Look at the skin too — it should be tight and glossy, not dull or wrinkled, and it should smell sharp and green even through the peel. That smell is the whole point of a lime. It is not there to be sour for the sake of sour. It is there to cut through fat, to wake up a dull sauce, to lift fish or avocado or a rich coconut broth so the flavors stand up straight instead of lying flat on the tongue.

Some people say a lime and a lemon are the same thing, just different colors. No! Smell them side by side and you will notice it at once — the lime is sharper, greener, less rounded than the lemon. Taste them side by side and the contrast is just as clear. This misunderstanding leads to a common mistake — cooks swap them without a second thought and then wonder why something in the dish feels slightly off. Treat the lime as itself, not as a green stand-in for something else.