Soupe à l'Oseille (Sorrel Soup)
A bright, lemony French soup of fresh sorrel in a creamy potato base, finished with an egg yolk liaison.
Ingredients
- 30g unsalted butter
- 1 onion, finely chopped
- 1 medium potato, peeled and diced
- 800ml light chicken stock
- 200g fresh sorrel leaves, stalks removed (from specialist greengrocers, farm shops or online, or grow your own)
- 2 egg yolks
- 100ml double cream
- Salt and white pepper to taste
- Fresh chervil or chives, to serve
Method
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Melt the butter in a large pan over a low heat and cook the onion for 8 minutes until soft but not coloured.
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Add the potato and stock, bring to the boil, then simmer for 15 minutes until the potato is tender.
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Add the sorrel and stir for 1 to 2 minutes until the leaves collapse and turn an olive green. Blend until smooth with a stick blender.
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Whisk the egg yolks and cream together in a bowl. Stir in a ladleful of the hot soup, then pour the mixture back into the pan.
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Heat gently for 2 to 3 minutes, stirring constantly, until slightly thickened. Do not allow the soup to boil or the egg will scramble.
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Season with salt and white pepper and serve topped with chervil or chives.