In 8 quart saucepot, heat ribs, peppercorns, bay leaves, 4 star anise, 1 cinnamon stick and enough water to cover to boiling over high heat. Reduce heat to low; cover and simmer 50 minutes to 1 hour until ribs are fork tender. Remove ribs to platter. If not serving right away, cover and refrigerate until ready to serve.
Prepare glaze: In 1 quart saucepan, heat soy sauce, remaining star anise and cinnamon stick to boiling over high heat. Reduce heat to low; cover and simmer 5 minutes. Remove from heat; let stand, covered, 5 minutes. Strain mixture into bowl; discard star anise and cinnamon. Stir in plum jam, grated ginger, and garlic.
Place ribs on grill over medium heat. Cook 10 minutes, turning once, until browned. Brush ribs with some glaze and cook 5 to 10 minutes, brushing with remaining glaze and turning frequently.