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Leek and cauliflower soup with lemongrass and coconut milk

Dominic Franks / 21 January 2016

Dominic Franks of Belleau Kitchen shares his contemporary Thai-inspired take on leek and potato soup, perfect for anyone wishing to cut down on their carbohydrates.

Leek and cauliflower soup
Leek and cauliflower soup

Preparation time

10 minutes

Cooking time

20 minutes




  • 1 medium onion - finely chopped
  • 3 leeks - washed and trimmed and chopped, reserve handful for garnish
  • 1 medium cauliflower – roughly chopped
  • 1 stick of lemongrass - snapped in three places but still together
  • A handful of fresh or frozen peas
  • 500ml veg stock
  • 150ml coconut milk
  • A large nob of butter (remember leeks LOVE butter!)
  • Olive oil
  • A pinch of salt and pepper to taste
  • Small red chilli to garnish


This soup is a wonderfully contemporary take on the classic leek and potato soup. Swapping out the potato for the cauliflower reduces the carbs but keeps it just as creamy. The lemongrass adds the most incredible fresh zingy taste. This soup is stunning served warm and spicy or can be served chilled in the summer.

In a large pan, gently heat a large knob butter and a little drizzle of olive oil, add your onion and let them sweat a little until they begin to turn translucent, then throw in your leeks and cauliflower and stir.

Add the lemongrass, turn the heat down to the lowest, place the lid on and let the vegetables sweat for at least 5 mins until they are soft, then add the peas and pour in the stock and coconut milk.

Let it bubble gently for another 10 minutes then turn off the heat and let it cool a little. Remove the stick of lemongrass before whizzing up with a stick blender, if necessary add more stock or milk to reach desired consistency.

Finely cut a small red chilli and a little leek to garnish and serve.

Our thanks to Belleau Kitchen on behalf of for this recipe.

Visit our soup recipe collection for more delicious soups and stews.


The opinions expressed are those of the author and are not held by Saga unless specifically stated. The material is for general information only and does not constitute investment, tax, legal, medical or other form of advice. You should not rely on this information to make (or refrain from making) any decisions. Always obtain independent, professional advice for your own particular situation.