Khrin (хрін, prepared horseradish)

Fresh horseradish looks like nothing: a pale root, rough-skinned, a little muddy, with no promise in it at all. Then the knife opens it and the whole room gets a slap. Your eyes water, your nose clears, somebody laughs from the doorway, and suddenly the cold table makes sense.

This white khrin is the version I put beside kholodets, salo, boiled pork, Easter eggs, anything rich and cold that needs waking up. The one thing that decides it is timing: grate the root, then catch its fire quickly with salt, sugar, vinegar, and a little cooled boiled water. Leave it exposed too long and the sharpness runs away into the air instead of staying in the jar.

Aunt Nadia's letter just says, "make it angry, then calm it." Very helpful, as usual. What she meant is this: it should bite first, then settle into clean sour-salt heat. If it only hurts, add a spoon of water. If it tastes sleepy, you waited too long, so make another jar and feed this one to beet salad.