In a 6-qt Instant Pot, add the water, miso, honey, vinegar, and soy sauce. Use a whisk to mix and mash it to combine (it’s okay if there are a few lumps of miso). Add the garlic, ginger, and beef chunks and use tongs to toss to coat in the mixture. Spread the chunks out into one layer and press it into the sauce.
Cover with the lid, set the valve to “sealing”, and pressure cook on high for 40 minutes. Once the timer goes off, let it naturally release for 10 minutes, then manually release the rest of the pressure by turning the valve to “venting”.
Press the “saute” button (set to high) to simmer the sauce for about 10-15 minutes while you shred up the beef, or until it’s reduced by about half. Transfer the beef chunks to a cutting board, let it cool off for a few minutes if you have time, then shred it up with two forks (remove any large chunks of fat or connective tissue).
Once the sauce has reduced, press “cancel”. Remove the ginger chunks. Return the beef to the pot and stir it to coat in the sauce. As the beef sits and cools, the sauce will thicken up. It tastes best if you let it rest/cool off in the sauce for 15 minutes.
Meanwhile, mix all of the slaw ingredients in a medium bowl (if using).
Turn it into a rice bowl, taco, lettuce wrap, or noodle bowl!