Preheat your oven to 375°F (190°C).
Season chicken breasts with salt, pepper, and your desired spices. Bake on a lined sheet for about 30 minutes until fully cooked.
While the chicken cooks, heat avocado oil in a skillet over medium-high heat. Sauté the onions and mushrooms for 7-10 minutes, or until the mushrooms are caramelized and tender.
Spiralize the zucchini into noodles and gently cook in the skillet with the mushrooms for 5-7 minutes. Do not overcook to prevent sogginess.
In a mixing bowl, whisk together garlic powder, cashew butter, almond milk, salt, and pepper until smooth and creamy.
Take the chicken out of the oven and let cool slightly. Cube into bite-sized pieces.
Combine the cubed chicken, cooked veggie mixture, and cashew butter sauce in the skillet. Stir to coat evenly.
Top with grated vegan cheese and crushed walnuts, if using. Transfer the skillet to the oven and bake for 10 minutes.
Remove, serve hot, and enjoy every creamy, nourishing bite!