For the chipotle sauce, use either the sauce from a can of chipotles in adobo, or chipotle hot sauce. Ground chipotle pepper can also be used. Add the desired amount according to taste. Start with less because it's pretty spicy!The apples can be chopped or diced into smaller pieces and stirred into the mashed sweet potato.To cook the sweet potatoes, bake, microwave, or boil, then mash well. Don't add milk or butter.