Preheat oven to 425 degrees F.
Start by cooking your pasta according to manufacturer's directions. When done cooking, strain and set aside.
Then, get your sweet potatoes ready. For this recipe I used two medium sweet potatoes, but ultimately you will want 1 and 1/2 cups of cubed sweet potato when done.
Peel sweet potatoes, and chop into cubes.
On a baking sheet lined with parchment paper, bake sweet potato cubes for about 15 minutes, or until soft.
Measure out 1 and 1/2 cups of the cooked sweet potato, and add to a blender with your cashews, almond milk, nutritional yeast, miso, and spices. Blend on high until mixture is smooth and creamy.
Pour sauce over pasta and mix well, then transfer to an oven-safe casserole dish or pan.
Bake macaroni in the oven for 20-30 minutes.