The Parboil Protocol: Boil pork bones, hocks, and beef shank for 10 minutes. Drain, scrub each piece of meat under cold water, and scrub your pot clean.
Start the Stockpot: Simmer pork bones and hocks in a clean pot with water, pineapple cores, aromatics, rock sugar, salt and flavor cube for 45 mins.
Instant Pot Shortcut: Pressure cook the beef shank with water, pineapple cores, aromatics, rock sugar, salt and flavor cube for 25 mins. Quick release.
The Ice Bath: Move the beef shank immediately into an ice bath. Once firm, slice into thin rounds. Slice deboned pork hocks and Chả Lụa.
Develop the Sate: Sauté minced lemongrass, garlic, and shallots in oil. Stir in annatto seed oil, Kim Tu Thap spice mix, chicken bouillon, and fish sauce. Add a ladle of broth to keep moist.
The "Funk" Factor: Dilute the Mắm Ruốc in water, let sediment settle, and pour only the clear flavored liquid into the main stockpot.
The Merge: Combine the Instant Pot beef broth with the stockpot. Add a small portion of sate for color and simmer. Season to taste with fish sauce and rock sugar.
Noodle Prep: Boil thick Bún Bò vermicelli until al dente. Drain and rinse in cold water. Microwave the noodles right before assembly.
Assembly: Build the bowl with warm noodles, sliced meats, shredded cabbage, and Rau Răm.
The Final Pour: Bring the broth to a rolling boil and ladle over the bowl. Serve remaining sate on the side.