Hot and Sour Soup with Tofu

INGREDIENTS

• 1 tablespoon vegetable oil
• 1 red bell pepper, chopped
• 3 green onions, chopped
• 2 cups water
• 2 cups chicken broth
• 1 tablespoon soy sauce
• 1 tablespoon red wine vinegar
• 1/4 teaspoon crushed red pepper flakes
• 1/8 teaspoon ground black pepper
• 1 tablespoon cornstarch
• 3 tablespoons water
• 1 tablespoon sesame oil
• 6 ounces frozen snow peas
• 1 (8 ounce) package firm tofu, cubed
• 1 (8 ounce) can sliced water chestnuts, drained