
Preheat oven to 425 degrees F. Line a rimmed baking sheet with foil; lightly coat with cooking spray. Set aside. Toss sweet potatoes with oil, salt and pepper in a large bowl.
Arrange the sweet potatoes in a single layer on the prepared baking sheet. Roast, turning once, until tender and lightly browned and crispy on the outside, about 20 minutes. Set aside to cool before assembling bowls.
Transfer 2 tablespoons peanut dressing into each of 4 small lidded containers; refrigerate for up to 4 days.
Divide kale among 4 single-serving containers (about 1 1/2 cups each). Top each with one-fourth of the roasted sweet potatoes and 1/2 cup chicken. Seal the containers and refrigerate for up to 4 days.
Just before serving, drizzle each salad with 1 portion of peanut dressing and toss well to coat. Top with 1 tablespoon chopped peanuts.