1 cavolo nero, roughly chopped
4 baby fennel bulbs, thinly sliced
4 garlic cloves
1 lemon, juice only
4 small onions, quartered
1 small baking potato
few sprigs thyme
2 tbsp olive oil, plus extra
300ml/10fl oz olive oil
pinch saffron
40²µ/1Β½΄Η³ϊ butter
1 large free-range egg yolk
150²µ/5Β½΄Η³ϊ chorizo
2 x 250g/9oz cod pieces
125ml/4fl oz Reisling wine