Place the pork liver in a pot and cover with water. Add a pinch of salt and boil the pork liver until completely cooked (about 15 minutes). Cool the pork liver in an ice bath before slicing.
Add more water to the pot and boil the shrimp. Remove the shrimp and let them cool completely.
Add the oil, garlic, shallot, quail eggs, and ground pork to a small frying pan and stir fry. Season the pork with a little salt and transfer to a serving plate.
Check on the pork butt (in the large pot) to see if it is fully cooked. It should be cooked to an internal temperature of at least 160°F (71°C). You can check this using a meat thermometer. Remove and transfer to an ice bath before slicing it.
Season the pot with salt and fish sauce and cook the noodles according to the package instructions.