Remove old leaves from mustard greens, using only the center part (each stem about 2 inches long). Boil 8 cups water and add baking soda. Scald greens for about 1 minute, remove and rinse in cold water. Drain dry.
Cook mustard greens in chicken soup about 3 minutes over low heat. Remove and drain.
Soak scallops in hot water for 3 hours. Steam for 20 m