Stir-Fry Sauce (Brown Garlic Sauce) - You know how to make this Vegatarian - For low carb: skip sugar or use stevia and use xanthan gum instead of cornstarch. To avoid soy, use coconut aminos instead of the soy sauce.
So many people don't attempt making asian dishes because the sauces are too complex. Here is a list of sauces you can make without stress. I have listed them in the "Directions" sections so as to not copy/paste so many times.
Restaurant Secret: Real Chinese All Purpose Stir Fry Sauce you can make in 2 minutes and store in the fridge for when you need it. Incredibly versatile - recipe includes suggested flavour additions as well as directions for how to use.