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Leek & potato soup

Lunch · Dinner · British

Leek & potato soup

Silky, peppery and about as cheap as soup gets. Sweat the leeks slowly and it does the rest.

Start to finish
1 hr
Hands-on
29 min
In the fridge
4 days
Freezes
Yes

VegetarianContains gluten, dairy, celery

Ingredients

4 portions
  • 4Leeks
  • 1Brown onion
  • 30gButter
  • 600gPotatoes
  • 2 cubesVegetable stock cube, in 1.2 litres water
  • ½ tspDried thyme
  • 200mlSemi-skimmed milk
  • 4 slicesSourdough, to serve

Plus salt, pepper and water.

Method

  1. 1

    Trim the leeks, halve them lengthways and slice. Swish them around in a big bowl of cold water to wash out any grit, then lift them out. Chop the onion.

  2. 2

    Melt the butter in a large pan, add the leeks and onion with a pinch of salt, cover and sweat over a low heat for 12 minutes, stirring now and then, until soft but not coloured.

    12 min, mostly hands-off

  3. 3

    Meanwhile, peel the potatoes and cut them into 2cm dice. Crumble the stock cubes into 1.2 litres boiling water.

  4. 4

    Add the potatoes, thyme and stock to the pan. Bring to the boil and simmer for 20 minutes, until the potatoes break up when pressed.

    25 min, mostly hands-off

  5. 5

    Blitz with a stick blender until smooth, stir in the milk and season well with salt and plenty of pepper. Warm through without boiling.

  6. 6

    Leave to cool, then ladle into tubs for the fridge or freezer.

On the day

Microwave for 3 to 4 minutes, stirring halfway, or heat in a pan until piping hot. Plenty of black pepper, with the sourdough toasted on the side.