Since you're making a sort
of gravy here, there are all sorts
of delicious things you can add to the reduction sauce as it cooks to flavor it: fresh or dried rosemary, fresh or dried thyme, finely minced garlic or onion, a
teensy splash
of balsamic vinegar or lemon juice, and even a small
bit of butter or olive oil and flour to
help the sauce thicken as it reduces.