Combine the lentils with one cup water in a large saucepan. Bring to a boil and then lower to a simmer. Cover and cook for about 15 minutes.

Meanwhile, heat oil in a skillet. Add the onions and sauté for about 10 minutes, until golden and slightly caramelized.

Drain the lentils and add the rice, salt, onions and remaining two cups water. Bring to a boil; cover, reduce flame to low and simmer for about 30 minutes.

Remove from fire and sprinkle with onion topping before serving.