Smoked Haddock, cheesy celeriac, leek & rosemary gratin
- 25g butter
- 200g smoked haddock
- 2 leeks, outer layer removed, washed of any grit and sliced into rings
- small handful rosemary leaves, roughly chopped
- 1 bay leaf
- 300ml double cream
- 300ml milk
- 1 celeriac (about 500g), peeled, quartered and thinly sliced
- 100g cheddar or gruyère, coarsely grated
Heat the butter in a saucepan. Add the leeks, rosemary and bay leaf, then cover and cook very gently over a medium-low heat for 15-20 mins until the leeks are soft. Pour over the milk and almost all of the cream, then season and bring to the boil. Remove from the heat and leave to cool a little, then scoop out the bay leaf.
Pour a little of the leek mixture into an ovenproof gratin dish. Arrange a layer of celeriac and some of the smoked haddock in the dish, then season. Spoon over some more of the leek mixture and scatter with a little cheese. Repeat the process, alternating between layers of the leek mixture, cheese and celeriac slices & smoked haddock, then finish with a drizzle of cream and the last of the cheese.
Heat oven to 180C/160C fan/gas 4. Bake the gratin for 1 hr-1 hr 15 mins until the top is golden, the haddock is cooked and the celeriac is tender when poked with a knife. If the gratin is browning a little too much, cover the dish in foil.