Heat the oil and add the mince. Brown over a high heat, stirring and breaking the mince up.
Add the drained chickpeas, keeping the heat high.
Stir occasionally until chickpeas begin to brown and pop - 5 to 10 minutes. A non-stick pan works best, but don't worry if mixture sticks a bit. If it begins to scorch, lower heat slightly.
Add the spices chipotle (or chilli) and garlic and cook, stirring, for about a minute.
Add reserved chickpea liquid (or ~400ml water) and stir, scraping bottom of pan to loosen any browned bits.
Add the preserved lemon and barberries then season with salt and pepper, then turn heat to medium-low.
Continue to cook until mixture is no longer soupy but not dry.
Recipe by Third Breakfast at https://thirdbreakfast.com/persian-chickpeas/