chorizo , sliced 6 chicken breasts , boned and cut into small pieces ground black pepper 5 oz ( 150 g ) onions , chopped 4 sticks celery , chopped 8 oz ( 225 g ) green peppers , chopped 1 tablespoon chopped garlic 1 pints ( 700 ml ) stock cayenne pepper 14 oz ( 400 g ) white long-grain rice heat the oil in a large , heavy saucepan and add the sausage .