1 large unwaxed lemon, juice and finely grated zest
1 large onion, finely chopped
3 tbsp chopped fresh parsley
1 tbsp chopped fresh sage
salt and freshly ground black pepper
150g/5Β½oz fresh white breadcrumbs
1 tbsp vegetable oil
40²µ/1Β½΄Η³ϊ butter, plus extra for greasing
700g/1lb 9oz pork sausage meat