Caramelised onion soup

Method

1. Heat oil in a large pot.
2. Add onions and stock cubes. Cook over a low heat until onions are soft and beginning to brown slightly. This will take approximately 1 hour.
3. Add water and vinegar and bring to the boil. Reduce soup to a simmer and cook for a further 30 minutes.

Tip

To make this dish vegetarian use vegetable stock cubes.