That sounds good.
To make it kosher, when I make French onion soup I have to make “onion broth,” can’t use chicken, but it’s not that bad. Can use raw onions, just boil em in the water for a while, or leave em in a crock put, water and onions.
That way we can use cheese. Gots to have that cheese on top. I agree, bread not needed.
If you can use soy sauce that would add a lot of flavor. Interested in my onion jam recipe?