In a bowl, combine all sauce ingredients and set aside.
Season chicken with salt, pepper, and 1 tablespoon of the sauce.
Heat oil in a large skillet over medium-high heat.
Cook chicken 5–6 minutes until browned and nearly cooked through.
Add bell peppers, zucchini, and chili peppers. Stir-fry 2–3 minutes.
Pour in the remaining sauce and add cashews. Toss to coat.
Let sauce reduce. Stir in xanthan gum if desired to thicken.
Remove from heat and serve hot with cauliflower rice or zoodles.
