Sauce is tamari, ketchup, garlic, ginger, and sambal, and I air fried the soy curls with habanero powder, tamari, and more garlic and ginger before tossing them in the sauce. It's a terrible picture but it's delicious, can recommend.
I order the 12 lb. box and store them in two 5 gallon buckets. In recent years I have gotten more into making seitan from wheat gluten powder, but the curls are still a good option and my preferred choice for fajitas.