Buy all ingredients right below the recipe
INGREDIENTS
- 450 g white onions
- 1 tablespoon olive oil
- 20 g butter
- 1 teaspoon Dijon mustard
- 2 teaspoons dried thyme
- 2 teaspoons brown sugar
- 1 tablespoon white wine vinegar
- 900 ml vegetable broth (can be substituted with water)
- Salt
- Pepper
SERVING INGREDIENTS
- Spring onion
- Sourdough bread toast
INSTRUCTIONS
- 1Peel the onions, halve them, and slice them thinly. In a large pot, heat a tablespoon of olive oil over medium heat. Once the oil is hot, add the sliced onions to the pot and sauté over medium heat until golden brown (this will take about 6–8 minutes).
- 2Once the onions are golden, add butter, Dijon mustard, dried thyme, brown sugar, and white wine vinegar to the pot and sauté everything for another 2–3 minutes over medium heat.
- 3Finally, pour 900 ml of vegetable broth into the pot and add salt and pepper to taste. Cover the pot with a lid and simmer on low heat for 13–15 minutes.
- 4Divide the finished onion soup into 4 bowls and serve.
SERVING TIP
- 1You can serve the soup sprinkled with finely chopped spring onions and with a slice of sourdough bread toast.

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The author of the photograph is Marie Bartošová.
