Preheat the oven to 425 degrees. Prepare the potatoes by making piercing with a fork (about 5-7 per potato). Rub each potato with oil. Place on a baking sheet and move to the oven. Bake for 45-50 minutes (depending on oven). Lower the temperature to 400.
While the potatoes are baking, make the sauce: in a food processor or blender, blend cashews, broth, nutritional yeast, lime juice, 1 tbsp apple cider vinegar, 2 tsp chipotle spice, 1 tsp cumin, salt, garlic, and cilantro. Blend until smooth, pausing to scrape down the sides with a spatula when needed.
Now make the chicken. You can either bake in an oven at 350 for 25 minutes, then shred. Or use a skillet that is coated with oil, and saute for about 5 minutes per side (or until no longer pink). Once chicken is cooked, shred with a fork. Sprinkle with reamining chipotle spice and cumin. Whisk together the apple cider vinegar and tomato paste, pour on top of the chicken and stir.
Once the potatoes are baked, remove from oven. Slice in half, and scoop out the flesh of the sweet potatoes (leaving a small rim around the potatoes, about 1/4 inch). Place the flesh in a large bowl, and pour in 3/4 cup of the "cheesy" sauce. Mash or beat until smooth and the potatoes are nice and creamy. Spoon the mixture back into the potato skins, evenly distributing the mixture.
Place a few tablespoons of shredded chicken on top of the potatoes. Transfer the potatoes back to the oven. Bake for another 15-20 minutes. Remove and garnish with cilantro, green onion, and guacamole.