Preheat a grill to high heat or preheat the oven to 425 degrees.
In a bowl, toss together sweet potato, onion, zucchini, chipotle pepper and sauce, olive oil, paprika, cumin, and salt.
Place 4 large strips of foil on the counter. (I like to use heavy duty or double up when I'm grilling). Place 1/4 of the sweet potato mixture and 1/2 of the sliced turkey sausage in each one.
Fold the foil over the mixture longways and seal then curl up the sides and seal.
If grilling, place the packets directly on the grates, cover, and cook for about 20 minutes, or until sweet potato is softened.
If baking, place packets on a rimmed baking sheet and bake for 20 minutes or until sweet potato is softened.
Carefully unseal packets and allow steam to escape. Place the mixture on plates if desired or serve straight out of the foil. Sprinkle each packet liberally with cheese while it's still hot.
Serve with sour cream, salsa, and cilantro.