In a skillet put a strand of olive oil. Add the mushrooms and sauté for about 5 minutes. Reserve.
In a saucepan, place 1 tablespoon of olive oil and the chopped onion. Shortly after, add the chopped garlic. Let it sauté for 1-2 minutes. Add the rice.
Cover with 2 cups of hot water and season with salt to taste. Cover and let cook over low heat for about 8 minutes.
After this time, add the mushrooms and cook for another 5 minutes.