Preheat oven to 450°F.
In a small bowl, mix the plums,
onion, rice, mushrooms, ginger, and 1 tablespoon of the soy sauce to make stuffing.
Fill
hens with stuffing. Baste hens with a mixture of 1 tablespoon olive oil and the
remaining 1 tablespoon soy sauce.
Put hens in the oven and roast for
20 minutes. Reduce heat to 350°F and continue cooking 20 to 30 minutes more, or until
hens are browned and a meat thermometer registers 165°F.
Split hens, remove skin, and
arrange with stuffing on 4 plates. Use pan juices as gravy.