The pickle can be made up t0 2 hours ahead of time. The mackerel can either be cooked under the grill or for a bit of showmanship in front of your guests, they can be cooked with a blow torch.If you can't find white balsamic, use sushi rice vinegar which is vinegar that has been sweetened with sugar. Pickled ginger can also be in the food aisle where they sell Japanese ingredients.
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Ingredients
1cucumbervery thinly sliced
2spring onionsvery thinly sliced
2tbsppickled gingerroughly chopped
3tbsprapeseed oil
1tbspwhite balsamic vinegar (see note above)
grindingwhite pepper
6mackerel filletspin boned
Instructions
Spread the cucumber and spring onions on a plate. Sprinkle with several pinches of salt and set aside for 15 minutes.
In a small bowl, whisk rapeseed oil with vinegar and add a generous grinding of white pepper. Drain the cucumber of any juice that may have accumulated, add the ginger, pour over the oil and vinegar, give everything a good and set aside while you cook the mackerel.
Preheat the grill to high. Line a baking tray with lightly greased foil. Wash and pat dry the fillets, pin bone and score the skin (watch video).
Whisk the oil and lemon. Season the fillets with salt and pepper then drizzle the oil over both sides of the the fish. Place under the grill 4 minutes. Serve hot or warm with salad and pickled cucumbers.