Place the zucchini ribbons in a colander over a bowl. Sprinkle with ½ teaspoon sea salt and let them rest for at least 30 minutes to release excess moisture.
Heat the avocado oil in a large skillet over medium-high heat.
Season the chicken on both sides with Italian seasoning, sea salt, and cayenne pepper.
Cook the chicken for 8–10 minutes per side, or until fully cooked. Remove from the skillet and allow it to cool slightly before chopping into bite-sized pieces.
Reduce the heat to medium and melt the butter in the same skillet, scraping up the flavorful browned bits from the bottom.
Whisk in the heavy cream or quinoa cream and bring to a gentle boil while stirring continuously.
Reduce the heat to medium-low. Stir in the minced garlic and Parmesan cheese until the sauce becomes smooth and creamy.
Add the chopped chicken, zucchini noodles, and parsley to the skillet. Toss gently until everything is evenly coated.
Cook for about 2 minutes until the zucchini is just tender and warmed through. Serve the Creamy Zucchini Chicken Alfredo immediately with extra Parmesan if desired.