Sorrel

Sorrel, my friend, is sour on purpose. That sharp, puckering taste comes from the acids built into its leaves, and it is exactly why cooks reach for it in green borsch. You don't need chemistry lessons to understand it — you need your tongue. Bite a leaf raw. If it bites back, sharp and clean, it's good sorrel. If it tastes flat or grassy, leave it on the counter.

Choose it the way you choose any leaf: look for brightness, not darkness. The green should look alive, almost glossy, and the leaves should feel crisp, not limp like old lettuce. Smell it too — fresh sorrel smells green and slightly tart, like lemon zest's quiet cousin. But smell only gets you so far; the sourness lives on the tongue, so taste a leaf before you decide.

Now, the misconception. Some people say sorrel is just spinach with a sour streak, so you can treat it the same way — cook it long, cook it hard. No! The sourness doesn't boil away; it stays in the pot. What long cooking ruins is the leaf itself: sorrel turns olive within seconds of real heat, and if you keep it on the stove it collapses into mush. The mistake this leads to is a green borsch with no character — soft and tired on the spoon. Add your sorrel near the end, and let the heat touch it, not cook it.