Leek, potato & three cheese gratin
Waitrose and Partners

Leek, potato & three cheese gratin

Elly Curshen's gratin using leftovers makes the most of the affinity the leek has with potatoes and cheese.

  • Serves8
  • CourseSide
  • Prepare20 mins
  • Cook1 hr 10 mins
  • Total time1 hr 30 mins

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Ingredients

  • 500g Essential Leeks
  • 3 large Essential Potatoes, peeled and cut into 0.5cm slices
  • 40g Essential Butter, plus extra for greasing
  • 2 tbsp Essential Plain Flour
  • 400ml Essential Whole Milk
  • 60g blue cheese, roughly chopped (I used Gorgonzola, but Stilton, Roquefort or Dolcelatte all work)
  • 60g Gruyère, grated (Comté, Emmental or Gouda also work)

For the topping

  • 30g Essential Butter, melted
  • 40g breadcrumbs (made from dry stale bread, blitzed in a food processor)
  • 20g walnuts or pecans, roughly chopped
  • 20g hazelnuts or almonds, roughly chopped
  • 50g Essential Mature Cheddar, grated

Method

  1. Preheat the oven to 180ºC, gas mark 4 and lightly butter an ovenproof serving dish about 22x30cm. Trim the leeks and cut them into 1cm rounds. Wash well and drain.

  2. Place the sliced potato into a large saucepan and cover with water, plus an extra 10cm or so. Bring to the boil, then add the leeks and return to the boil. Cover with a lid, simmer for 5 minutes, then drain.

  3. Meanwhile, make the sauce. Melt the butter in a saucepan and whisk in the flour until smooth. Season. Add the milk gradually, whisking continuously. Cook for 1 minute, then add the blue cheese and grated hard cheese. Change to a heatproof spatula or wooden spoon. Cook over a low heat until the cheese is melted, stirring continuously.

  4. Tip the drained potatoes and leeks into the buttered dish. Pour the sauce over the top. Mix the melted butter for the topping with the breadcrumbs and chopped nuts, then sprinkle over the top. Cover with foil and bake for 40 minutes. Remove the foil, sprinkle the grated Cheddar over the top and bake for another 20 minutes, until piping hot, golden and bubbling.

Nutritional

Typical values per serving when made using specific products in recipe

Energy

1,475kJ/ 354kcals

Fat

20g

Saturated Fat

11g

Carbohydrates

29g

Sugars

5.1g

Fibre

3.9g

Protein

12g

Salt

0.7g

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