Melt the coconut oil in a frying pan over a medium heat. Add the chorizo and onion and cook, staring occasionally, for two minutes. Add the Cavolo Nero and cook for 1 minute, or until just beginning to melt.
Crank up the heat to maximum and add the cod and tomatoes. Stirfry for about three minutes, or until the fish is cooked through.
Squeeze in the tomato purée and stir in. Poor in 50 mL of water and reduce the heat to a slow bubble.
Scatter over the cheddar cheese and let it melt in the residual heat.
Finish the dish with the pinenuts and a generous sprinkling of parsley.