Ingredients :
- 4 large onions
- 100g grated Gruyère
- 4 slices of country bread
- 1l of chicken stock
- 20g butter
- 1 tbsp flour
- Salt and pepper
Directions :
- peel and slice the onions
- Melt butter in a large pot, add the onions and cook them until golden. Sprinkle with the flour and cook for 30s.
- Season to taste with salt and pepper and add the chicken stock. Cover and simmer for 30 min.
- Ladle the soup in 4 heatproof bowls
- Put a slice of bread on each bowl and pile on the cheese. Gril until melted