Dissolve the tamarind pulp in 1 cup of hot water. Work the pulp until dissolved and then strain the liquid through a fine sieve, discarding the pulp. Combine the tamarind water, fish stock, fish sauce, pineapple, pickled bamboo shoots, and sugar into a clay pot and bring to the boil. Add the calamari and prawns to the pot. Bring back to boil, discarding any impurities that float to the top. Now add tomatoes, green banana, okra and elephant ear stems. Bring back to the boil, tranfer to serving bowl then add rice paddy herb, coriander, fried garlic, garlic oil, and chile.
*Can be found at specialty Asian markets.