Squeeze lime juice over chicken. Rub with salt and pepper. Brown chicken in oil until well browned on all sides. Remove and set aside. Add water, onions, scallions, garlic, and curry powder to pan. Simmer for 10 minutes. Add tomatoes, coconut milk and broth. Bring to a fast simmer. Return chicken to pan, cover and simmer for 15 minutes. Serve over rice.