BoulangÃ¨re potatoes

Fruit and vegetables

1kg/2lb 4oz medium-sized Maris Piper or DesirÃ©e potatoes, peeled and thinly sliced using a mandolin or sharp knife

4 garlic cloves, thinly sliced

2 onions, thinly sliced

1 tbsp finely chopped fresh thyme leaves

salt and freshly ground black pepper

80g/2Â¾oz butter

75g/2Â¾oz gruyÃ¨re, grated

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