Since the lentils are decorticated, they will cook quickly, in 15-20 minutes. At this point check seasoning, and add salt and pepper to taste. Note the herb bag floating in the soup.
The other thing you should do now is heat a small pot of water for the pasta to add to the soup, salting it when it comes to a boil.
Figure a handful of a short tubular shape such as ditali per person.