1 radicchio or red chicory head, finely sliced
1 red onion, finely sliced
green salad leaves (optional)
1 thyme sprig, leaves only
1 tsp dijon mustard
225g/8oz plain flour, plus extra for dusting
salt and freshly ground black pepper
陆 tsp salt
1 tsp sugar
50g/1戮oz cold butter, cubed
30g/1oz butter
250ml/9fl oz double cream
3 medium free-range eggs
75g/2陆oz gruyere or Cornish vintage Gouda
50g/1戮oz cold lard, cubed