Have the lentils well washed (in cold water) and the onion prepared as indicated in the ingredients description.
Heat the olive oil in a large saucepan over moderate heat. Add the onion and a pinch of salt and sauté for 3 minutes until lightly golden. Add then the lentils and cover with the vegetable stock. Cook for 25 minutes stirring from time to time.
Remove the saucepan from the heat and with the help of a hand mixer (ideally a powerful one of at least 450 watt) mix it all well until perfectly combined.
Add the small shaped pasta to the lentils soup and salt to taste, and heat for 4 minutes or the time indicated in the pasta package. Remove from the heat and serve hot.
Notes
If you do not have vegetable stock available you can replace it with water.
Recipe by Tasty Mediterraneo at https://www.tastymediterraneo.com/rishta-lebanese-lentils-soup/