Harissa

Steps

1. prep8 min
   gloves on, over a bowl
   dried chiles, stems twisted off and the pods slit open, then seeds and pale inner membranes shaken or scraped out. This is the decision that determines what the finished jar is for. Seeds and membranes carry most of the capsaicin: leave them and you get a fierce paste used a half-teaspoon at a time, take them out and you get deep chile flavour you can spread on bread. Wear gloves — the oil transfers to your hands and then to your eyes hours later, and rinsing does not remove it
2. rest25 min
   covered in boiling water, weighted under a small plate
   prepared chiles + boiling water to cover, pushed under with a plate so they do not float and rehydrate on one side only, until they are completely pliable and no leathery patch remains. Then drain and squeeze them hard in your fist, a handful at a time, until no more water runs out. The squeeze is not optional tidiness: water left in the chiles thins the paste, prevents the olive oil from coating it, and shortens how long the jar keeps because a wet paste spoils where an oily one does not
3. toast3 min
   dry skillet, low heat, shaken constantly, then cooled completely
   caraway seeds + coriander seeds, moved in a single layer over low heat until they smell sharply of themselves, darken a shade and the odd seed pops. Toast wakes the aromatic oils bound inside the seed and drives off the dusty raw note; whole seed does this and pre-ground spice cannot, because it lost those volatiles the day it was milled. Pre-ground here is a real downgrade rather than a shortcut. Let them cool fully before grinding — warm seeds smear into an oily cake in a grinder instead of shattering to powder
4. mash10 min
   mortar, or a processor pulsed — stop short of a puree
   garlic + salt worked to a paste first, + ground toasted spice, + the squeezed chiles a handful at a time, + olive oil worked through until it just loosens. Starting with the garlic and salt matters: the salt crystals act as an abrasive that tears the garlic cells open, which no blade does as thoroughly. Stop while the paste still has visible texture and grain. The mortar is the traditional tool and gives a coarser, better result; the processor is the practical one, and its failure mode is running it until the paste is a smooth, slick, characterless puree
5. store4 min
   glass jar, a quarter inch of oil on top, refrigerated
   harissa packed into a clean glass jar and pressed down to drive out air pockets, then flooded with a quarter inch of olive oil across the whole surface. The oil cap is what makes this keep — it seals the paste from air, so mould and oxidation have nothing to work with. Re-level the surface and re-cover it with fresh oil after every single use, and the jar runs from about three weeks to a few months refrigerated; skip that and it is a week. Give it a day or two before judging it: the raw garlic is aggressive on the first day and settles into the chiles by the second