01 - In a large stockpot, bring 6 cups of water to a rolling boil. Add pork chunks, skimming off any scum or impurities that rise to the surface for a clearer broth.
02 - Add quartered tomatoes and onion to the pot. Simmer covered for 20 minutes, or until pork begins to tenderize.
03 - Stir in sliced daikon radish and continue cooking for 10 minutes until slightly tender but still retaining crunch.
04 - Add eggplant slices, trimmed string beans, and green chili peppers. Simmer for 5 minutes until vegetables begin to soften.
05 - Mix in the tamarind soup base, ensuring it dissolves completely. If using fresh tamarind pulp, mash with a small amount of water and strain into the soup.
06 - Season with fish sauce, salt, and black pepper. Taste and adjust seasoning as needed to achieve the characteristic savory-tangy balance.
07 - Add spinach or kangkong leaves and simmer for 2–3 minutes until just wilted. Avoid overcooking to maintain vibrant color and texture.
08 - Ladle hot soup into bowls and serve immediately with steamed white rice.