Sliced oranges make a refreshing addition to this substantial salad - great for the lunchbox
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Make it veggie
Instead of mackerel, use 1 aubergine and 2 peppers. Chop into small chunks, add a drizzle of oil, plus salt and pepper. Roast for 25 mins at 200C/180C fan/ gas 6. Toss through the couscous with the dressing, orange slices and watercress.