Smothering fish with cheese and mustard may sound a little over the top, hut surprisingly it’s an excellent combination, and a quick one too. It goes particularly well with coley, which on its own can he rather a dull number.
Preheat the grill and line the grill rack with foil.
Season the fish lightly on both sides with salt and pepper. Mash the cheese firmly with the mustard and enough milk to make a very thick paste. Brush both sides of the fish lightly with oil, then grill, skin-side up (if it ha