Sour Fish Head Soup

Ingredients

 * 2 Scallions, white part only, -crushed with the side of a -knife
 * Freshly ground black pepper
 * 2 ts Salt
 * 2 tb Plus 4 teaspoons fish sauce -(nuoc mam)
 * 1 lg Fish head or fish carcass, -split down the center
 * 1 qt Water
 * 1/2 c Canned sliced sour bamboo
 * 1/4 Fresh pineapple, cut in a -lengthwise section and -sliced
 * 1 ds MSG (optional)
 * 2 tb Mixed chopped fresh -coriander (Chinese parsley)
 * Scallion green