Tourin Blanc (Périgord Garlic and Onion Soup)
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Ingredients
- 4 onions, thinly sliced
- 6 garlic cloves
- 900 ml vegetable stock
- 2 egg yolks
- 1 tbsp white wine vinegar
- 30 g unsalted butter
- 60 g gruyère cheese, grated
- 4 day-old crusty bread
Nutrition (per serving)
- Calories
- 326 kcal
- Protein
- 12.3 g
- Carbohydrate
- 34.3 g
- of which sugars
- 10.3 g
- Fat
- 14.7 g
- of which saturates
- 7.8 g
- Fibre
- 3.5 g
- Salt
- 2.32 g
Estimated from typical values for each ingredient — a guide, not a substitute for the label on what you actually buy.
Method
- 1
Melt the butter in a large pot and cook the onions and garlic gently for 15 minutes, stirring often, until very soft but not coloured.
- 2
Pour in the vegetable stock, bring to a simmer and cook for 15 minutes.
- 3
Whisk the egg yolks with the white wine vinegar in a bowl, then whisk in a ladleful of the hot soup to warm the yolks through.
- 4
Stir this mixture back into the pot off the heat until the soup thickens slightly and turns silky.
- 5
Place a slice of bread in the base of each bowl, scatter with the gruyère cheese and ladle over the hot soup.
- 6
Serve immediately.

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