While you may shy away from bitter melon, this soup has just a hint of bitterness that is well balanced with the sour pickled mustard. As the soup simmers, the bitterness gets less prominent and other flavors blend in.
Some people like to add pork intestine to add more flavor and texture to the soup. With the intestine, the required cooking/stewing time is pushed to 2 hours or more. Pork ribs cook faster, perfect for an hour window of cooking time.
The picture doesn’t do the soup justice at all. The aroma of the simmering pickled mustard and bitter melon soup is so mouthwatering. It tastes like a comfort food. It's good with a bowl of rice or serve as an accompaniment to spicy dishes.