French onion soup with cheesy toasts

Slow-caramelised onions in a deep beefy broth, with melting cheese toasts on top.

Ingredients

Method

  1. Melt the butter with the oil in a large, heavy pan. Add the onions and sugar and cook over a low-medium heat for 40 minutes, stirring often, until deep golden brown.
  2. Stir in the flour for 1 minute, then add the stock gradually, stirring.
  3. Add the herbs, season and simmer for 15 minutes.
  4. Heat the grill. Toast the bread slices on both sides.
  5. Ladle the soup into ovenproof bowls, float the toasts on top and cover with cheese. Grill for 3 to 4 minutes until bubbling and golden.