Pat the prawns dry with kitchen paper. Put a non-stick frying pan over a medium heat and add the oil
Stir-fry the chorizo for a couple of minutes until sizzling. Then tip in the garlic and sauté until it has started to sizzle, then add the prawns. Sauté for 2 minutes until the prawns turn pink and start to curl.
Add the butter and sliced chilli and toss until melted. Olive a squeeze of lemon and scatter over the parsley to serve.