Recipe: Fish cooked in a spiced tomato sauce with tahini and coriander

This is based on a fantastic North African dish called chraime.

Fillets of white fish are gently cooked in a tangy tomato sauce spiced with paprika, cumin and preserved lemon, before being drizzled with tahini and torn coriander – it's divine.

Cooking fish in this way yields beautifully tender flakes, which absorb tons of flavour from the tomato sauce with its lovely warming spices, ideal for when the weather begins to turn. Preserved lemon is a pretty key element here, adding both salinity and a tanginess, but it can be salty, so be careful with your seasoning. I often eat this on its own as a light supper, but it is great with couscous and pitta.

The sauce can be made in advance, but I would save cooking the fish until you're going to eat it. Any white fish works well, either fillets or cut across the bone.

Serves 4

Ingredients

• 4tbs olive oil
• 1 brown onion, finely sliced
• 5 cloves of garlic, finely sliced
• 2tbs smoked paprika
• 1tsp ground cumin (ideally toast 1tbs of seeds and then grind in a pestle and mortar)
• A pinch of chilli flakes (or a few whole dried chillies)
• 2tbs tomato purée
• 2 x 400g tins of plum tomatoes
• 1-2 preserved lemons, depending on size
• 4 fillets or slices of white fish (hake, pollack, halibut, bass, etc)
• Chopped fresh coriander (or parsley), for serving

For the tahini sauce

• 1 clove of garlic
• ½ lemon
• 80g quality tahini
• 5-6tbs ice-cold water
• A little ground cumin

In a wide pan, warm the olive oil, then add the onion with a pinch of salt and fry until soft. Add the garlic and spices and fry for a minute or two until fragrant, then add the tomato purée. Cook out the purée for a couple of minutes, stirring to make sure it doesn't catch on the bottom of the pan.

Pour in the tinned tomatoes, then rinse out each tin with a splash of water and pour that in too. Break up the tomatoes with a wooden spoon and simmer for about 10-15 minutes to thicken the sauce. Quarter and deseed the preserved lemons, then chop into small pieces before adding to the sauce. I would recommend adding the lemon a tablespoon at a time, tasting as you go to find the right balance. I say this because they come in many sizes and strengths, so you really need to taste and get the amount right for you.

To make the tahini sauce, grate the garlic into a bowl, squeeze over the juice of half a lemon, mix together and leave for five minutes. The acidity of the lemon will relax the heat of the garlic. Pour in the tahini and whisk together – it will begin to stiffen – then slowly pour in the ice-cold water, a tablespoon at a time, whisking as you go until you have a smooth, drizzly sauce. You want it to be quite runny.

Season with a pinch of salt and a dash of cumin. Taste and adjust with a little more salt and/or lemon as need be. Season the fish and nestle it into the tomato sauce. Cook for about 5-10 minutes, depending on the thickness of the fillets, until just cooked. Serve immediately, with warm pitta and couscous, and finish with lots of tahini sauce and fresh coriander.

The Farm Table by Julius Roberts (Ebury Press, £27)