Jerusalem artichoke gratin

Jerusalem artichoke gratinJerusalem artichokes are rarely used, but they're delicious in a gratin! We love its artichoke flavour.
Ingredients
- 454g (1 lb) Jerusalem artichokes
- 300ml (1 1/4 cups) 35% cream
- 1 egg
- 1 ml (1/4 teaspoon) grated nutmeg
- A knob of butter
- 125ml (1/2 cup) finely grated Gruyère or Cheddar cheese
- Salt and freshly ground pepper
Preparation
- Preheat the oven to 180°C (350°F).
- Wash and brush the Jerusalem artichokes in cold water to remove any soil. Slice as thinly as possible by hand or with a mandolin.
- Mix the cream, egg, nutmeg and seasoning in a bowl.
- Butter a 23cm (9in) square baking tin and arrange half the Jerusalem artichoke slices in it.
- Pour in half the cream mixture and sprinkle with half the cheese. Add the remaining Jerusalem artichoke slices. Pour over the remaining cream mixture and sprinkle with the remaining cheese.
- Bake in the middle of the oven for 40 to 45 minutes, or until the gratin is golden brown and the Jerusalem artichokes are cooked (prick with a fork to check that the Jerusalem artichokes are tender).
- Leave to rest for 5 minutes and serve.