Poach the chicken breast, drain then chop into bite sized pieces. Set aside. Heat the oil in a large wok or frying pan. Sauté the onion until soft, add the garlic and fry for a further minute. Add the remaining vegetables and fry until softened and beginning to char, about 10mins. Add the tomatoes, herbs, spices, rice and stock. the Bring to the boil then reduce heat. Simmer for 20 minutes covered. Add the chicken and continue to cook until the rice is tender and the chicken has warmed through. Remove the bay leaves and serve.