Whisk seasoning, balsamic and olive oil until well combined. Place pork into a resealable plastic bag and pour in marinade. Squeeze out air and seal bag; marinate 2 hours (overnight is even better).
Preheat oven to 350 degrees F (175 degrees C). Be watchful if using the convection setting, as it could prematurely brown the balsamic. We use the convection setting last 10-15 minutes.
Place pork into a glass baking dish along with marinade. Bake in preheated oven, basting occasionally until the pork reaches an internal temperature of 145 degrees F (65 degrees C), about 1 hour. Let the roast rest for 10 minutes before slicing and serving.