Chop the onion, leeks and the carrot
Fry the onion for 3 minutes
Add the chopped carrots and cook for 5 more minutes
Add the leeks, salt and sugar stirring until leeks get soft
Add the rice and the tomato paste
Pour 1 cup boiling water, cover with a lid and cook on low heat for 15 minutes until rice is soft
Serve at room temperature with lemon juice