The main thing to know about french lentils is that they hold their shape and stay pretty firm when cooked, which makes a french lentil soup a different animal than other lentil soups. This one hit the spot. I won't repost since I did basically as the recipe's author instructed (including using a spice bag).
I did substitute tomato paste for tomatoes; use dried thyme & oregano instead of fresh; add some dried kombu (sea vegetable) that was lurking in my cupboard for smoky flavor + nutrition; and substitute a mix of soy sauce/bullion/rice vinegar for the worchestershire sauce (since it has anchovies in it).
All of which is just to say, it's a forgiving recipe like most soups are, and it was DELICIOUS. And I highly recommend miso , soy sauce and tomato together as a veggie soup base.