Rub the salmon with the turmeric, cumin, mustard and some seasoning. Put the ginger, garlic, coriander and most of the chillies (save a few slices) in a food processor and whizz together. Add the yoghurt and some salt. DO NOT BLEND YOGURT
Spread most of the yoghurt mixture over both sides of each piece of salmon (keep back a couple of tbsp). Take 4 sheets of foil, then sit a salmon fillet in the middle of each. Seal to make parcels, leaving a bit of room for air to circulate. Cook in the oven at 200c for 8 minutes.
Sprinkle the cooked salmon with the remaining chillis and serve with green beans, basmati rice, the remaining yoghurt mixture and some lemon wedges.