In a small bowl, whisk together the tamari, rice vinegar, arrowroot powder, minced ginger, and minced garlic to create the Kung Pao sauce glaze.
Pat the chicken breast dry with paper towels and dice into 1-inch cubes, then season evenly with the sea salt and black pepper.
Heat the avocado oil in a large skillet or wok over medium-high heat until the oil is shimmering and hot.
Add the chicken to the skillet in a single layer and sear for 3-4 minutes, turning occasionally, until golden brown and cooked through.
Toss in the sliced red bell pepper, diced zucchini, and dried szechuan chiles, stir-frying for another 3 minutes until the vegetables are tender-crisp.
Pour the prepared sauce over the chicken and vegetable mixture and toss constantly for 1 minute until the glaze thickens and coats everything beautifully.
Remove the skillet from the heat and stir in the raw peanuts and sesame oil to provide a nutty aroma and crunch.
Serve the crispy stir-fry immediately over the warm cooked white rice for a complete, balanced meal.