A traditional Filipino sour soup made with fish, vegetables, and tamarind broth.
Steps:
1. In a large pot, bring water to a boil. Add onions, tomatoes, and radish. Let it simmer for 10 minutes.
2. Add the fish, green chili, and tamarind soup base. Cook for another 10 minutes.
3. Add water spinach and cook for 5 minutes. Season with fish sauce, salt, and pepper to taste.