Serves 8: prep time 1 hour 30 mins: cook time 1hour 50 mins
3 Cloves Garlic
400ml Double Cream
400ml Whole Milk
1 Onion, cut into 4 thick slices
1 Bay Leaf, scrunched up
A few knobs of Butter,plus extra for the fish
1kg floury Potatoes, very thinly sliced
250g Whole Cooked Chestnuts, roughly chopped into chunks
250g Brussels Sprouts, shredded
125g Cheddar Cheese, grated
A grating of Nutmeg
1/Squash the peeled garlic cloves with the blade of a knife, then put in a large saucepan with the cream, milk, onion slices, bay leaf and 2 tsp sea salt. Bring to the boil over a low heat. When the mixture is bubbling, remove from the heat and leave to infuse for 1 hr.
2/Heat the oven to 160C/140C fan/gas 3, and generously butter a large, deep baking dish. Sieve the infused milk over a bowl and discard the onion, bay leaf and garlic (you can reserve these to use in a bread sauce, if you like). Arrange a layer of the potatoes in the dish, then scatter over some of the chestnuts, sprouts, cheese and a little nutmeg. Drizzle over some of the infused milk mixture. Repeat until you’ve used all the ingredients, finishing with a layer of potatoes, then cover with the last of the infused milk mixture. Dot over a few small knobs of butter.