When butter is melted, add in the rice and bring back to a boil. Lower the heat to very low and cover. Allow to cook for 25-30 minutes, until all the water is absorbed. OR make the rice in a rice cooker, adding the butter and salt in with the water.
Take the cooked rice and spread it in a 9x13 pan, allowing it to cool while you work.
In a bowl, combine the sour cream with 1/4 cup of the onion and the cilantro. Salt to taste.
In a pan, saute the garlic and the rest of the onion in the oil. Stir in the peppers and frozen corn. Saute for about 1 minute.
Add the sour cream mixture, vegetables and cheese to the rice in the pan and stir to combine.
Bake at 350 for 30 minutes, or until heated through.
Visit simpleandseasonal.com for more great recipes like this one!