Main Course

Simple Fish Gratin

Ingredients

  • 600ml whole milk​
  • 2 bay leaves​
  • 600g mixed smoked / fresh fish
  • 2 tbsp olive oil
  • 3 large Tesco Finest echalion shallots, finely sliced
  • 2 garlic cloves, crushed​
  • 3 tbsp plain flour​
  • Finely grated zest ½ lemon​
  • 2 tbsp roughly chopped parsley plus extra to serve
  • 100g Gruyère cheese, coarsely grated​
  • 40g panko breadcrumbs​

Method

  1. Preheat the oven to 190˚C/170˚C/gas 5. Put the milk and bay leaves into a large lidded saucepan or deep frying pan and heat until steaming and just beginning to bubble. Add the fish, put the lid on and turn the heat off for 4 mins. Carefully lift the fish onto a plate and reserve the poaching liquid (discard the bay leaves). Remove the skin from the haddock and roughly flake the fish into large chunks.​
  2. In another large frying pan, heat 1 tbsp of oil and cook the shallots over a medium heat for 10-12 mins until golden. Add the garlic for 1 min. Stir in the flour for another 2 mins, stirring constantly, then add the milk little by little and stir for 3-4 mins until thick enough to coat the back of a spoon. Add the zest, parsley and half the cheese and stir until melted, then add the fish, and spoon into a 2-litre baking dish.
  3. Toss the breadcrumbs with the remaining tbsp of oil and scatter over the top, then scatter over the remaining cheese. Bake for 25-30 mins until golden and bubbling then serve with a scattering of parsley.