An hour of onions
90 minutes · serves 4 · Easy
What you need
- 1kg onions, sliced thin
- 60g butter
- 1 tbsp oil
- 1 tsp sugar
- 150ml dry white wine
- 1.2L vegetable stock
- 1 baguette
- 150g gruyère, grated
- Thyme
What you do
- 1Onions, butter, oil and a pinch of salt in a wide heavy pan, lid on, 15 minutes to sweat them down.
- 2Lid off, sugar in, and now the long part: 45 minutes on medium-low, stirred every few minutes. They go gold, then amber, then properly brown. There is no shortcut and every minute you cut shows in the bowl.
- 3Wine in, scraping the pan, reduced by half. Then the stock and thyme, simmered 20 minutes.
- 4Toast rounds of baguette, float them on the soup in ovenproof bowls, heap the cheese on.
- 5Under a hot grill until the cheese is blistered and running down the sides.
