How to Make Baked Leek and Potato Gratin
- Preheat the oven to 350. Cook the potatoes in plenty of lightly salted boiling water for 3 minutes until slightly softened, then drain. Cut the leeks into 1/2 inch lengths and blanch them in boiling water for 1 minute until softened, then drain.
- Turn half the potatoes into a shallow ovenproof dish and spread them out over the edge. Cover with 2/3 of the leeks, then add the remaining potatoes. Tuck the slices of cheese and the remaining leeks in among the top layer of the potatoes. Season and pour the cream over.
- Bake for 1 hour until tender and golden. Cover with foil if the top starts to overbrown before the potatoes are tender.