2 Bramley apples, peeled, cored removed, diced
400g/14oz onions, peeled, sliced thinly
850g/1lb 13oz potatoes, peeled, sliced thinly
1 tbsp fresh thyme leaves
450ml/16fl oz chicken stock
salt and freshly ground black pepper
2 tbsp caster sugar, to taste
1 tbsp sea salt
25g/1oz butter
1kg/2lb 2oz pork belly, fat scored with a sharp knife