BUDDHIST SOUR SOUP

Steps:

• For the soup, place the tofu blocks on a plate, place another plate on top, and weight with a jar or 14 to 28-ounce can. Let stand for 30 minutes. Water will be pressed out of the tofu as it stands; drain it off every 15 minutes or so. Cut the tofu into 1/2-inch cubes and set aside.
• Use your fingers to squeeze and press the tamarind to dissolve it completely and to squeeze the last of the pulp off any seeds and pith. Place a sieve over a small bowl and pour the tamarind water through. Discard any solids and set the liquid aside.
• If the okra is large, cut crosswise in 1/2 and cut off any tough tips, leaving the stems on.
• For the garnish, heat the oil in a small heavy skillet over medium-high heat. Add the shallots and cook until well-browned, then remove from the heat and set aside.
• To make the soup, place the tamarind liquid and the 5 cups water in a large nonreactive pot. Bring to a vigorous boil, then add the okra (if your okra is very fresh and tender, add it later, with the tomato wedges) and pineapple. Boil vigorously for 3 minutes, then add the bac ha, if using, the sugar, salt, and tomato wedges. Bring back to a boil, then add the tofu cubes and soy sauce and cook for 2 minutes. Taste and adjust the balance of seasonings if you wish.