Dice the sweet potato into cubes (about eight pieces). Put them in a pot and add just enough water to cover. Bring to a boil and cook until tender when pierced with a fork, 10 to 15 minutes. Drain the potatoes, return to the pot, and gently mash with a fork or potato masher. This should make about 1/2 cup (110 g) mashed sweet potatoes. Set aside.

Add the cashews to a blender or food processor. Transfer the potatoes from the pot to the blender. Add the miso, nutritional yeast, chipotle powder, smoked paprika, turmeric, garlic powder, cumin, and water. Begin blending to reach a consistency that is easy to pour but still slightly thick. Add oil (or water) as needed to achieve that consistency. Use immediately. Any left over can be stored in a covered container in the refrigerator for up to 5 days.