In a large pan, heat the oil over a medium heat. Add the onion, then throw the red pepper, celery, and chilli flakes into the pan and cook for 2–3 minutes until softened.
Tip in the sweet corn, vegetable stock, and coconut milk and increase the heat to high. Stir through the smoked paprika, then partially cover with a lid. Cook for 10 minutes, stirring occasionally.
Remove from the heat and season with sea salt. Ladle half the soup into a blender and blast until completely smooth. Pour the smooth half back into the unblended soup and combine. Serve hot with spring onions, coriander and a wedge of lime to garnish. Serves 4.