Heat the oil in a deep frying pan over a high heat. Add the chicken and brown all over – don’t cook completely. Once browned, transfer to a plate. Reduce the heat to low, add the onions and cook slowly until softened, about 10 mins.
Add the garlic, stir for 1 min, then toss in the chorizo and fry until it releases its oils. Stir in the spices, then tip in the rice. Stir to coat the rice in the oils and spices for about 2 mins, then pour in the hot stock. Bring to the boil, return the chicken to the pan and simmer for about 20 mins, stirring occasionally.
Add the peas to the pan and simmer for a further 5 mins until the rice is cooked and the chicken is tender. Season well and serve with the lemon wedges and chopped parsley.