While the lentils are cooking, in a saucepan bring water to a boil, then add the rice and a teaspoon of salt and cook until the rice is done, preferably al dente. Drain the excess of water.
Add the drained rice to the lentils soup and mix it all well. Serve hot.
Recipe by Tasty Mediterraneo at https://www.tastymediterraneo.com/lentil-rice-and-vegetable-soup/