Bring a large pot of water to boil. Add the salt.

Add the rice and cook for 3-4 minutes, until the rice is no longer crunchy.

Drain the rice. Add the rice back into the pot. Squeeze half of one lime over the rice and add a tablespoon of butter. Tightly seal the rice and let it steam for 20 minutes.

When the 20 minutes is up, add the juice of 1 lime and the cilantro. Toss. Add more lime juice if desired.