Preheat oven to 400 degrees. Coat a 9- x 13-inch baking dish with the coconut oil.
Place chicken and butternut squash in prepared baking dish.
In a small bowl, whisk together remaining ingredients (paprika through mustard); pour mixture over chicken and butternut squash then toss well to coat.
Arrange chicken in a single layer in the baking dish and fill the spaces with butternut squash. Bake, uncovered, for 30 minutes or until internal temperature of chicken registers at least 165 degrees and squash is fork-tender.