Knead the mince with the finely chopped onions, egg and seasonings. Leave it to stand for a while and form small balls from it, gently roll them in flour, then fry them in a little preheated oil in a pan, just enough to change their color.
Leave to boil until lentils and meatballs are cooked. Don't use too much water, it needs to have nearly evaporated toward the end.
Stir in the tomato paste, season with more spices and remove the dish from the heat.