Easy Onion Soup Recipe

Easy onion soup recipe


This recipe’s so easy to make and the only essential thing is the onions and a tasty vegetable stock – the rest is up to you.

It’s basically a soup you can made when your cupboards are bare. But that doesn’t mean it lacks flavour!

If you don’t have any vegetable stock, you can follow the recipe below and still make this soup delicious but the best way is to use a yummy vegetable stock. See this post for how to make the tastiest vegetable stock.

4-6 people

Easy Onion Soup Recipe

Quick and easy, gluten free, vegetarian, onion soup. Delicious and warming.

15 minPrep Time

30 minCook Time

40 minTotal Time

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  • 6 large onions cut into half-rings
  • 3 cloves garlic
  • olive oil
  • 1 celery stick
  • 3 large chopped tomatoes, peeled if tough-skinned
  • 1 large red pepper, finely chopped
  • 1 carrot, whole
  • 1 leek, chopped
  • salt and pepper
  • gluten free soy sauce
  • 1 tsp Marmite


  1. Peel the onions and cut them into fairly fat half-rings.
  2. Heat a little olive oil in a wide based pan and put the squeezed garlic and the onions on to fry on a med-high heat. Sprinkle with salt.
  3. Fill a large saucepan 3/4 full with water and add 1 stick celery, 1 chopped leek and 1 whole carrot. Season with salt and bring to the boil. Then reduce the heat and leave to simmer slowly with a lid on.
  4. When the onions are beginning to brown, you'll need to stir and watch them so that they don't burn, but you can brown the onions fairly fast for this recipe.
  5. Add a dash of gluten free soy sauce and stir for a moment before transferring the onions to the pan with the stock.
  6. Chop the red pepper into small bits and fry in the pan where the onions were.
  7. After a few moments add the chopped tomatoes to the red peppers and cover. Leave to cook for about 5-7 minutes, until the tomatoes begin to lose their shape.
  8. Add the tomato and red pepper mix to the soup pan.
  9. Add 1 tsp Marmite and leave to cook for 30 minutes, checking the seasoning and adding salt and pepper as necessary.

If you liked this recipe, you may also like this traditional French onion soup recipe.

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