Add tomato and cook for two minutes until slightly softened, followed by chicken.
Season with salt to taste. Bring to a simmer, stirring often to coat the chicken, and reduce heat to low. Cover, and cook for ten minutes until chicken is cooked through.
Add water and return heat to high; bring to a boil.
Drain rice in a colander, and add to pot. Gently stir, adding chopped mint and coriander, and lemon juice. Return to a boil, then drop heat to low.
Cover pot with aluminum foil and lid, and cook for 12 to 15 minutes until all liquid has been absorbed.
Enjoy hot with onion pachadi (plain yogurt, chopped onions, salt)!