Hot and Sour Soup with Tofu

INGREDIENTS

• 1 (14-ounce) package firm water-packed tofu, drained
• 1 3/4 cups water, divided
• 1 (1/2-ounce) package dried sliced shiitake mushroom caps
• 4 cups fat-free, less-sodium chicken broth
• 1/4 cup white vinegar
• 2 tablespoons less-sodium soy sauce
• 1 tablespoon finely chopped peeled fresh ginger
• 2 teaspoons sugar
• 3/4 teaspoon white pepper
• 1 garlic clove, minced
• 2 1/2 tablespoons cornstarch
• 1/2 cup canned sliced bamboo shoots, drained and cut into julienne strips
• 1 large egg, lightly beaten
• 1/2 cup thinly diagonally sliced green onion tops