Soy sauce has soy and often wheat and since we are allergic to both I have been looking for alternatives. I tried coconut aminos which were nice. When I ran out I tried this recipe and made my own (talk about cooking Chinese supper from scratch!): http://glutenfreerecipebox.com/gluten-free-soy-free-soy-sauce
This was pretty good actually. Do you have a recipe you could share?
--- Update: I found this company, South River Miso, that makes gluten free and soy free tamari! We bring this to sushi places with us!