Fish Tofu Chowder

Ingredients

• 4 - 5 dried black mushrooms (soaked to soften)
• 1/2 lb firm white fish fillet (coarsely chopped)
• 1 teaspoon cornstarch
• 1/4 teaspoon salt
• 4 cups fish stock or chicken broth
• 2 tablespoons rice vinegar
• 1 tablespoon grated ginger
• 1 teaspoon sesame oil
• 1/8 teaspoon ground white pepper
• 1/2 lb soft tofu (drained and cut into small cubes, about ½ lb)
• 2 tablespoons goji berries (soaked to soften)
• 3 tablespoons cornstarch (dissolved in 3water)
• 1 tablespoon chopped cilantro (optional)