Heat the oil over high heat in a wok or large frying pan and sauté the chicken with the onion and the peppers. When the chicken begins to brown, add the garlic and continue to cook for 1/2 minute. Add the flour to the pan and stir and fry until well blended, 2 or 3 minutes. Add the tomatoes, bay leaves, thyme, salt and pepper, and the stock and bring to a boil. Lower the heat to just simmering and cook for 15 to 20 minutes, stirring occasionally to prevent sticking (watch for bottom-sticking). Serve over rice, garnished with chopped parsley.