Potato and onion soup

Creamy and smooth with floral notes from fresh herbs, finished with sweet caramelised onions for an extra hit. This recipe is great for using up a glut of home-grown spuds.

Soups and starters
A bowl of our potato and onion soup made from a recipe in our Cookbook
  • Preparation time 15 minutes (prep. time)
  • Cooking time 1 hour (cooking time)
  • Serves 6


  • 20ml vegetable oil
  • 750g onions, sliced
  • 3 garlic cloves, chopped
  • 10g fresh sage
  • 600g potatoes
  • 1ltr boiling water
  • 10g vegetable bouillon or 1 stock cube
  • Small sprig fresh thyme
  • 120ml milk
To serve
  • 2tsp vegetable (rapeseed) oil
  • 100g red onions, finely sliced


  1. Peel the potatoes and cut into chunks.
  2. Place on a lined baking tray, add the sage and half of the oil and mix well, cover and place into a preheated oven (180C) for around 40 minutes, stirring occasionally, until soft and lightly coloured.
  3. Meanwhile pour the oil into a heavy based pan on a medium hob and add the onion and garlic.
  4. Sauté for 10 minutes until soft, reduce the heat and cover with a lid. Leave to sweat for a further 20 minutes. Remove the lid, increase the heat and allow to colour slightly.
  5. Add the potatoes to the onions and stir well.
  6. Add the water and the bouillon or stock cube and bring to a rapid boil. Continue to boil for a further 15 minutes until all the vegetables are soft.
  7. Remove from the heat and blend with a stick blender until perfectly smooth.
  8. Add the thyme leaves and the milk, season well to taste.
  9. For the topping place the oil in a pan add the sliced onions and sauté until soft, place a spoonful on top of the soup when you serve.