In a large frying pan, cook the chorizo until fragrant and slightly crispy and set aside.
Add the prawns and cook for 2-3 minutes until opaque. Then remove from the pan and set aside.
Heat the olive oil over medium heat. Add the onion and sauté for 2-3 minutes until translucent.
Add the garlic and cook for 1-2 minutes until fragrant.
Pour in the white wine and simmer for a few minutes until reduced by half.
Add the risotto rice and toast until the grains become hot.
Start to add the stock one ladleful at a time, allowing the liquid to be absorbed before adding more. Continue this process for about 15-20 minutes until the rice is creamy and cooked to your desired level of doneness.
Remove the pan from the heat and season with black pepper, and salt to taste. Stir in the Parmesan, and add the lemon zest and juice.
Stir in the cooked prawns and chorizo.
Serve immediately, topped with fresh parsley.