Heat oil in a medium saucepan over medium heat 2 minutes. Add the onion, ginger, and garlic and cook, stirring occasionally, until onion is softened, about 3 minutes.
Add the remaining ingredients. Stir, and bring to a simmer. Reduce heat to low; continue simmering, stirring occasionally, until the plums and cherries are falling apart, about 5 minutes.
Transfer the mixture to a blender. Vent blender (so steam can escape), and blend until smooth. Alternatively, use an immersion blender.
Slice pork, and fan out on a serving platter. Pour sauce over pork slices.