Cheesy seafood gratin

• olive oil↗2 tsp tsp
• leeks↗3 3

  halved and thinly sliced

• small pack parsley↗½ ½

  finely chopped

• fish250g g

  pie mix (ours contained haddock and salmon)

• wholegrain mustard↗2 tsp tsp
• pot cheese↗350ml ml

  sauce

• wholemeal bread

  to serve

Step-by-step instructions

1. 1

   Heat oven to 200C/180C fan/gas 6 and heat the oil in a large frying pan. Add the leeks and some seasoning, and cook for 10 mins until really soft. Stir in half the parsley and spoon into 2 gratin dishes.

2. 2

   Divide the fish between the 2 dishes, mix the mustard into the cheese sauce and spoon over the top of the fish. Place on a baking tray and cook for 15 mins – you can put the bread in the oven to warm through for the last few mins if it is a little stale. Remove the bread from the oven and turn the grill on to brown the tops of the gratin for 2 mins, then remove from the oven. Scatter the gratin with the remaining parsley and serve with chunks of bread to mop up.