Turn on the Instant Pot and press Saute. Sear the osso buco pieces seasoned with salt and pepper for 2 to 3 minutes per side until caramelized. The trick so they don't stick is to add olive oil and a bit of butter.
Set the pieces aside and, on the same option for 15 Minutes, sauté the onion, garlic, and ají mixture.
Add the cilantro blended in beer. It is important to remove the stems to avoid the stew getting bitter.
Reduce the alcohol while sautéing, until the strong notes of the beer are no longer perceived, and season with salt to taste.
Return the pieces of meat and add the potatoes and carrots along with the peas.
Close and lock the Instant Pot® lid. Make sure the steam release handle is turned to Sealing. Press Pressure Cook and set time to 30 Minutes.
Finally, release the steam and serve with white rice. Enjoy!