Rinse rice once to remove dust and dirt. Place rice in a pot and fill it with water (water should be at least 3 cm above the layer of rice). Add sweet potatoes and bring water to boil.

Upon boiling, reduce heat to medium low and continue cooking till rice turns to porridge and sweet potatoes are semi-soft and cooked. Have a pot of hot water ready in case you need to top up some water when the porridge dries out during cooking.