Add the coconut oil to a medium skillet over medium-high heat. Add the garlic, mushrooms, onion, chicken, and a splash of water to the skillet. Cook for 5-6 minutes, stirring frequently, until the chicken is completely cooked through.
Meanwhile, in a small cup, mix together the coconut milk, lemon zest, lemon juice, cayenne, and salt. Add this mixture to the skillet. Stir well and turn off the heat.
Add the rinsed noodle to the skillet and stir. Add the fresh basil and serve.