Prepare couscous with vegetable stock, according to the packet's instructions.
Heat olive oil in a large pan and stir fry the chorizo for 3-4 mins. Remove with a slotted spoon and put aside. Add the onion to the oil left in the pan and cook for 5-6 minutes until softened. Stir in the paprika, cook for 1 min, then tip in the chickpeas and the chicken stock. Return the chorizo to the pan and simmer for 2 mins. Spoon over the couscous and scatter with chopped parsley.