Like things uber-tart? Add more lemon juice. The only thing that’s non-negotiable: smoked fish. Still, there’s room for creativity — this salad is just as tasty when made with whitefish as ...

Add the fish and cook for two minutes on each side, or until the fish is cooked, turning just once. For the salad, toss the chillies, coriander and mint leaves, shallots, mangetout and lime zest ...

and fish sauce or anchovy. Mix until well incorporated, then season with salt and pepper. Add more mayo, 1 tablespoon at a time, if desired. Spoon tuna salad onto 4 bread slices, top with lettuce ...