01 - Preheat oven to 350°F.
02 - Place the turkey breast skin-side down on a cutting board. Butterfly if thick; gently pound to an even thickness if needed.
03 - Layer ham slices evenly over the turkey, then carefully roll up the turkey breast with the ham inside. Secure with kitchen twine at 2-inch intervals.
04 - In a small bowl, mix together honey, Dijon mustard, brown sugar, lemon juice, thyme, pepper, garlic powder, paprika, and salt to form the glaze.
05 - Arrange onion, carrots, and celery in the bottom of a roasting pan. Place the rolled turkey ham roast on top of the vegetables.
06 - Brush half the glaze over the turkey. Pour chicken broth into the pan around (not over) the roast.
07 - Roast uncovered for 80–90 minutes, basting with remaining glaze halfway through, until internal temperature reaches 165°F.
08 - Remove from oven. Tent with foil and rest for 15 minutes before slicing.
09 - Slice and serve with pan juices and roasted vegetables.