01 - Activate sauté function on the Instant Pot. Add halved onion and sliced ginger; cook for 3 to 4 minutes, turning to evenly char exterior.
02 - Incorporate beef brisket, beef broth, star anise pods, cinnamon stick, whole cloves, fish sauce, soy sauce, sugar, and a pinch of salt into the pot.
03 - Secure the Instant Pot lid and set to high pressure for 30 minutes.
04 - While broth cooks, soak rice noodles in hot water for 20 to 25 minutes until tender, then drain and set aside.
05 - Upon completion, allow a natural pressure release for 10 minutes. Manually release residual pressure after.
06 - Extract beef from broth; set aside and slice thinly against the grain. Strain broth through a fine mesh strainer, discarding solids. Return clarified broth to Instant Pot and keep warm.
07 - Divide prepared rice noodles among four serving bowls. Top with sliced beef, bean sprouts, cilantro, Thai basil, scallions, and chili.
08 - Ladle hot broth over garnished bowls. Present with lime wedges, hoisin, and Sriracha alongside.