50 gmbrown sugar50 gmfine salt8blue mackerel fillets (see note) Hickory chips, for smokingFor brushing:olive oilTo serve:watercress sprigsSalsa golf1egg yolk2 tspDijon mustardJuiceof ½ lemon125 ml (½ cup) eachextra-virgin olive oil and vegetable oil1½ tbsptomato sauce2 tspWorcestershire sauceTo taste:TabascoPalm heart salad4royal blue potatoes, coarsely chopped3canned palm hearts, sliced (see note)1celery heart, shaved on a mandolin1avocado, coarsely chopped2golden shallots, thinly sliced1 cup (loosely packed)dill100 mlextra-virgin olive oil50 mlsherry vinegar
Combine sugar, salt and 1 litre water in a bowl, stir to dissolve. Slice mackerel into fingers, add to brine, stand for 2 hours, drain, pat dry with absorbent paper.
Preheat a coal-bedded kettle barbecue to low and set it up for indirect grilling. Add enough wood chips to cover base, place an oiled rack over, then place mackerel on rack. Cover and smoke for 5 minutes, then refrigerate until required.
Meanwhile, for salsa golf, whisk yolk, mustard and lemon juice in a bowl to combine. Whisking continuously, add oils in a thin stream, whisk until thick. Add tomato sauce, Worcestershire sauce and Tabasco to taste, season to taste, refrigerate until required.
Meanwhile, for palm heart salad, combine potato in saucepan with enough cold water to cover generously, bring to the boil over medium-high heat and cook until just tender (8-10 minutes). Drain, cool and transfer to a bowl. Add palm heart, celery heart, avocado, shallot and dill and toss to combine. Just before serving, add olive oil and vinegar, season to taste and toss to combine.
Heat a frying pan over high heat. Lightly brush mackerel with olive oil and sear, turning once (30 seconds). Scatter palm heat salad over serving plates, top with mackerel, drizzle with salsa golf, scatter with watercress and serve.
Note Blue mackerel is sometimes sold as slimy mackerel. Canned palm hearts are available from South American grocers; Australian importers include Latin Deli.
This recipe is from the December 2010 issue of Australian Gourmet Traveller.