Remove outside skin of fresh scallops and slice into thin round pieces (about 1-½ inch diameter). Cut cucumber, carrot and bamboo shoot into flour-shaped slices.
Stir-fry green onion in 2 tablespoons oil, pour in 2 cups soup stock, and cook for 3 minutes. Remove green onion, splash with vinegar, and add fresh scallops. Scald for 3 seconds, remove.