Prep time: 10min
Cook time: 50 min
Difficult: easy

Ingredients

50g butter
1kg brown onions , thinly sliced
2 tbsp thyme , picked leaves
3 tbsp dry sherry
beef stock fresh, cube or concentrate made up to 1.2 litres

Croutons

1 baguette , sliced
1 garlic clove , halved
extra-virgin olive oil
100g Gruy