Chop up half an onion.
Fry the onion and tomato puré together for a little bit.
Add water and salt to the mixture.
Wait until the water starts boiling.
Add the rice and turn the heat down to medium.
Mix it around, cover with a lid, and cook.
After 15 minutes, stir the rice and turn the heat down a little more.
Cook for another 10 minutes and check if it's done.
