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Mackerel with Leek and Tomato Sauce

fish with leek and tomato sauce

My  local fisho tells me that his mackerel is line caught, and that’s always a good thing as far as sustainability goes: no bycatch and no complete decimation of breeding populations.  Good Fish Bad Fish lists mackerel as sustainable too.  It’s high in Omega 3 and low in mercury, and it has a nice firm texture with few bones.  It’s an oily fish that goes well with acid tomato based sauce, and I have both tomatoes and leeks in abundance in my garden at the moment.

The Recipe:

For four serves:

  • Chop 4 leeks into 3 cm pieces.  There is usually hard to reach dirt in between the leaves, so I do this over the sink: take the outside leaves off and  the end off the green leaves.  Then chop from the bottom till I get up to where the leaves separate.  Then peel off the outside set of leaves, wash the grit out, chop another segment and repeat until I have used all the tender white and light green parts and I’m left with the tough outer leaves.
  • Add an equal quantity of tomato, roughly chopped if they are big tomatoes, whole if they are cherry tomatoes, and a slurp of good olive oil.
  • Add plenty of salt and pepper, a couple of bay leaves and a sprig of thyme if you have it.
  • If I am going out for the day, I use the slow cooker – set it on low with the lid off and leave.  Eight hours later, it is a thickish liquid tomato sauce with soft braised leeks.  This is the best way and it is so nice to come home to dinner pretty well sorted. If I am home or I want it faster, I use the slow cooker on high for about four hours, or an ovenproof dish with a lid, in a hot oven for 20 minutes with the lid, then another 10 minutes or so without the lid to reduce a bit. You want the sauce to be liquid , but not so liquid that it flows off the plate.
  • Fry the mackerel (fillets or steaks) quickly in a little olive oil, taking care not to overcook  and serve on a bed of leek and tomato sauce.
  • Couscous, green beans and zucchini all make good accompaniments.
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