Preheat your oven to 400°F and line a large sheet pan with parchment.
Mix your stuffing: In a bowl, combine melted butter, onion, celery, egg, broth, and seasonings. Toss with bread cubes and spread on half the pan.
Season the turkey: Mix butter with spices and slather it all over the turkey tenderloin. Nestle it right on top of the stuffing.
Sweet potatoes time: Toss the diced sweet potatoes with butter, honey, and brown sugar. Spread onto ¼ of the pan.
Finish with the brussels: Toss halved brussels with oil, garlic salt, and pepper. Add them to the last quarter of the pan.
Bake for 30 minutes, or until the turkey hits 165°F inside.
Garnish with parsley and cranberries. Slice the turkey and plate it up.