Ghormeh Sabzi (Herb and Dried Lime Stew)

Variations

• This dish is the opposite of the usual rule. Fresh herbs says delicate herbs — parsley, coriander and the rest — go in "off the heat, or in the last thirty seconds", because heat collapses them and drives their aroma off. That is right, and ghormeh sabzi makes that its aim. Twenty-five minutes in oil and the volatile grassy compounds are gone entirely, leaving what was underneath: something deep and almost meaty. The name means "fried greens".
• Even the guide's own exception is a different order of magnitude. It gives the holy basil in pad kra pao as the herb that "needs to be fried in oil for its aroma to appear at all." That is thirty seconds, and it brings out an aroma. This is twenty-five minutes, and it changes one. Same direction, very much further along it.
• Dried lime is not a substitute for lemon. Limu omani are limes boiled in brine and dried for weeks, so on top of sourness they carry bitterness and a fermented note. Swap in lemon and the acidity is similar but the dark finish that makes this dish itself is gone. If you cannot find them, lime juice with a little tamarind paste is closer than lemon.
• Fenugreek leaf is the signature. Parsley and coriander alone make a good herb stew, but not this one. It is also the one ingredient that turns the pot bitter if you are generous — about 5% of the herb weight is the ceiling.
• With kabab koobideh it makes the two poles of Iranian cooking: that one is charcoal and meat, this one is time and herbs.
• Against rogan josh: both are lamb stews, but Kashmir goes through spices and Iran through herbs. Spices are bloomed in fat and herbs are fried in it — the same move, opposite colours at the end.
• Vegetarian: leave the meat out and double the beans. It is common in Iran too.

Tips

• Get the herbs completely dry. Spin them, then spread them on a cloth for half an hour. Wet, they spend the twenty-five minutes steaming and never change colour.
• Do not skimp on the oil. 120ml for 400g of herbs looks like a lot, but they take it up as they fry and give it back at the end as a green slick on the surface. That slick is the sign the dish is done.
• Keep to the twenty-five minutes. Stop at ten and it is still green and tastes like a grass stew. The measure is the colour going dark, so watch the colour and the smell rather than the clock.
• Keep stirring. One patch caught on the base makes the whole pot bitter. Medium heat or lower, and scrape the bottom every minute or two.
• Weigh the fenugreek. When this dish comes out bitter it is almost always because the fenugreek went in by eye.
• Pierce the dried limes. Whole and unpierced, the skins are hard enough that almost nothing comes out of them. And take them out at the end — left in, they turn bitter.
• Cook the beans separately and add them late. In an acidic liquid the pectin in beans never softens, so they stay hard no matter how long you simmer. That is the acid, not under-soaking.
• It is better the next day, once the herbs and the lime settle. Plenty of Iranian households make it the day before.
• If it is thin, reduce it uncovered. No starch — the body comes from the herbs and the beans.