Make the broth: Blanch the beef bones and brisket in boiling water. Boil 8 gallons of water, add the beef bones, and cook on high heat for the first 10 minutes, skimming off any foam. Then reduce to a simmer, add 3.5 oz ginger and 3.5 oz shallots (or substitute with 8.8 oz onion), and simmer continuously for 10 hours.

Cook the brisket: After 3-4 hours, add the brisket to the pot and cook for 1.5-2 hours. When a chopstick easily pierces the meat, it's tender enough. Remove the meat, let it cool completely, then divide into 3-4 smaller portions, wrap tightly in plastic wrap, and store in the freezer. When ready to use, thaw and slice thinly.

Make aromatic pho fat: After 10 hours of cooking, skim off all the beef fat from the surface along with about 1 quart of broth. Place in a small pot with a lid, add 3.5 oz sliced ginger, 3.5 oz crushed shallots, 8.8 oz large onion pieces, 0.5 oz cinnamon, 0.7 oz star anise, 0.7 oz black cardamom, 0.04 oz cloves, 0.04 oz fennel seeds, and 0.9 oz fish sauce. Simmer on low heat for 30 minutes, then strain. Once cooled, refrigerate until the beef fat solidifies, then discard the liquid. Store the beef fat in a container in the fridge.

Once the beef broth is done, remove the bones, strain, and let cool. Then store in small containers (1-2 quarts) or bags in the freezer.

Make seasoning liquid: Boil 3 cups of water, add 6.3 oz salt, and 2.8 oz rock sugar until dissolved. Turn off the heat, then add 7 oz fish sauce and 3.5 oz MSG (or substitute with bouillon powder) and stir until fully dissolved. Use at a ratio of 2 oz seasoning liquid per quart of broth. If you prefer Saigon-style pho, increase the rock sugar to 3.5-3.9 oz. Once cooled, store in a container in the fridge (it will last all year).

To make the broth: Whenever you want to eat pho, simply take the broth from the freezer, bring it to a boil, and season with the seasoning liquid (2 oz per quart). Add a piece of aromatic fat (3.5 oz per 2.5 gallons) to the broth, and you'll have a fragrant Vietnamese pho broth. The rest is simple for you. Good luck!