1: Bruise the lemongrass using the spine of a knife to help release its flavor.
2: In a large pot, add the pork or beef bones and water. Bring to a boil.
3: Add onions, salt, fish sauce, shrimp paste, sugar, msg, chicken bouillon, and tamarind soup base powder to the pot.
4: Simmer for about 2 hours, skimming off any impurities.
5: In a separate pan, heat oil and add annatto seeds to extract color.
6: Strain the oil and add to the broth.
7: Serve hot with noodles, topped with meat of choice, scallions, cilantro, and herbs.
