*I used Against The Grain gluten-free baguettes. They come in a package of 2, and each baguette makes 2 sandwiches. I found them in the frozen bread section of Whole Foods.
**Not all Tamari is gluten free, and not all gluten free soy sauce is created equal. Check your labels and stay away from things with added sugar.
Chicken broth base is either powdered or a paste, similar to bouillon cubes, but with a more concentrated flavor. Orrington Farms and Better Than Bouillon make good gluten free versions. You can also use beef base, but personally, I've never met a beef base I liked as much as chicken base, even in beefy recipes.
I did not add any additional salt to this recipe because the beef broth, chicken base, and soy sauce add enough salt, but if you use low/no sodium versions of these, you may need to salt to taste.