In a medium pan with a tight-fitting lid, bring combine the salt and water. Bring the water to a boil. Add the rice and bring to a gentle simmer. Put the lid on the pan, reduce the heat to low, and allow the rice to cook for 18 minutes. Remove the lid and check to see if the water has evaporated. If not, continue cooking the rice, covered, for a few minutes more. When all of the water has evaporated, remove the pan from the heat and let rest, covered, until ready to serve. Just before serving, add the cilantro and lime juice and fluff with a fork until evenly combined.