To make the broth, add all broth ingredients to the Instant Pot.
Move the vent knob to the sealed position and select “Soup”. Cook for 20 minutes.
When the cooking time is up, carefully move the vent knob to “Venting” to quickly release the pressure.
Strain the broth through a mesh sieve and discard the aromatics (spices, ginger, shallots, and mushrooms).
If using shirataki noodles, drain and rinse under cold water.
To serve, place the shirataki noodles in serving bowls then top with the sliced brisket, herbs, green onion, bean sprouts, and sliced chili peppers.
Pour the boiling hot broth over the steak (this cooks the steak gently).
Serve with fresh lime wedges.