Cook the rice according to the package directions.
Meanwhile, heat the oil in a medium skillet over medium heat. Add the onion, garlic, and bay leaf and cook until softened, 8 to 10 minutes. Add the tomatoes, okra, corn, cayenne, ½ teaspoon salt, and ¼ teaspoon pepper and cook until the vegetables are tender, 6 to 7 minutes more. Add the chicken and cook, stirring occasionally, until heated through, 1 to 2 minutes. Serve over the rice.