Heat 1 Tbsp. of oil in a large pan over medium-high heat.
Season the prawns with salt and pepper, then fry in batches until browned, remove and set aside.
Heat the other half of the oil and add the chorizo cubes. Cook until the chorizo is crispy.
Add the onions, peppers, celery, and bay leaf to the pan and cook for 3-4 minutes until the vegetables begin to soften. Add the garlic and Cajun seasoning, then cook for another minute.
Add the rice to the pan and stir to coat it in all the spice mixture. Stir in the tomatoes and prawns. Add the stock, and then bring to the boil.
Reduce to a simmer, and cover. Cook for 15-20 minutes until the rice is just cooked, and tender.
Add the sweetcorn and cover the pan again. Cook for a further 5 minutes.
Season to taste with salt, and pepper and serve topped with the spring’s onions, and fresh parsley.