If the roast is large, cut it into 2-3 pieces to fit into the instant pot. In a small bowl, combine the spices and sprinkle over the roast evenly on all sides and set aside.
Turn the instant pot to saute and add the olive oil, once it is hot add the beef chunks and saute on all sids, remove to a plate and set aside while you cook the veggies.
Add an additional 2 T of olive oil and the onion, jalapenos and garlic and saute for 2-3 minutes then CANCEL the saute function.
Add the broth to the hot Instant Pot and deglaze the bottom of the pot, scraping all the bits off with a wooden spoon.
Return the beef and juices to the Instant Pot, put some of the onion and jalapenos on top of the beef, leaving some for a base then secure the lid on the instant pot, set the vent to SEAL and set the function to Pressure Cook for 50 minutes.
When the instant pot is done, let it Natural Release for an additional 10 minutes, then open the pressure release valve quickly to release any remaining pressure, once done, remove the lid.
Transfer the beef to a cutting board and with two forks, shred the beef. then squeeze half a lime over the beef for brightness and acidity. If you want to keep it very moist, put it in a bowl and spoon some of the cooking liquid over top (and onions, jalapenos), then use the beef in your favorite recipe
Serve in tacos, burritos, burrito bowls, taco salads, enchiladas with all of the usual accompaniments.