Preheat oven to 400 degrees.
Season chicken with Italian seasoning, garlic powder, paprika, and salt and pepper to taste.
Drizzle a large skillet over medium heat (at least 2-inches deep) with oil, add chicken and brown on both sides for 2-3 minutes. Transfer to a plate and cover to keep warm.
Add butter to the skillet. Add celery and onions and saute 1 minute, then add garlic and saute another minute until fragrant.
Stir in stuffing mix, then stir in chicken broth.
Return chicken to the pan, cover, and transfer to preheated oven. Bake for 15-20 minutes until chicken is cooked through.
Fluff stuffing with a fork. Garnish with fresh thyme or parsley.