Pre-heat the oven to 180°C (fan)/200°C/gas mark 6.
Peel and chop the Jerusalem artichokes. Place in a roasting tin and drizzle with olive oil and season with salt and pepper.
Place in the oven for 20 minutes, stir and return to the oven for a further 20 minutes. Check and see if they’re soft - if not stir and return to the oven for a further 20 minutes or until cooked through.
Meanwhile heat the remaining tablespoon of olive oil in a large saucepan. Add the chopped onion and fry over a low heat for 10-15 minutes until soft and turning golden brown.
Add the chopped garlic, stir and continue to cook until soft. Stir through the thyme leaves.
Turn off the heat and set aside until the Jerusalem artichokes are cooked. When they are ready add to the saucepan, stir well and add the remaining ingredients.
Bring to the boil then remove from the heat and allow to cool slightly before blending in a jug blender or with a stick blender.
Put back in the saucepan and reheat, seasoning to taste.
Notes
Nutritional information is approximate and is intended as a guide only.