In a small bowl, combine raw cashews with 1 cup of the water. Let soak for 3-4 hours or overnight. Once soaked, drain and rinse well.
Add the soaked cashews, 3/4 cup of water, garlic powder, nutritional yeast, walnut oil, lemon juice, salt and pepper to a high powered blender or food processor. Process until smooth. Set aside.
Using a vegetable spiralizer, spiralize your sweet potatoes.
Heat 1 tablespoon of walnut oil in a large skillet over medium heat. Add the sweet potato noodles. Sprinkle with a pinch of salt and pepper. Add the apples. Cook for 5-7 minutes, until the sweet potatoes are tender and the apples are soft. Add the spinach and stir until it wilts.
Drizzle in the creamy cashew sauce and stir to coat. Top with walnuts.