Leek and Sweet Potato Gratin

Our Leek and Sweet Potato Gratin recipe has everything you expect in an oven-baked potato gratin but switches things up with tender leeks, sliced sweet potatoes and ham. This cheesy sweet potato casserole is everything you want in a side dish… plus a bit more.

Leek and Sweet Potato Gratin

Cook Time: 1 hour 20 minutes
Servings: 4
Author: The Cook
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  • 125 ml chicken stock
  • 200 ml double cream
  • 150 ml milk
  • 1 clove garlic, crushed
  • 1 bay leaf , optional
  • 400 g sweet potatoes, peeled and thinly sliced
  • 400 g potatoes, peeled and thinly sliced (can be substituted for extra sweet potato)
  • 2 leeks, cleaned and thinly sliced
  • 175 g sliced ham, chopped
  • salt and freshly ground black pepper, to taste
  • 100 g grated cheddar cheese
  • butter, for greasing

Recipe Instructions

  • Pour the stock, cream and milk into a small saucepan, add the garlic and bay leaf and bring to the boil. Remove from the heat, cover and let the flavours infuse while continuing dish.
  • Preheat the oven to 180°C. Butter a 2 litre gratin dish well.
  • Mix the potatoes, leeks and ham together in the dish, and spread out in an even layer.
  • Pour over the stock mixture and tuck the bay leaf in the middle. Season and sprinkle with the cheese.
  • Stand the dish on a baking tray to catch any overflow. Loosely cover with foil and bake for 30 minutes. Test the potatoes with a knife – they should be just beginning to soften.
  • Remove the foil and bake for another 35-45 minutes, spooning some of the sauce mixture over every now and again until the potatoes are tender.
  • Cool for 15 minutes before serving.

Cooks Notes & Variations

You can add a few parsnips by reducing the equivalent amount of potatoes

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