Cut up the roast into large 3-4 inch chunks. Season the beef pieces with the salt, pepper and garlic powder. Set an electric pressure cooker to the sauté setting. Drizzle the olive oil in the pot of the pressure cooker. Place the beef in the Instapot and brown the pieces on all sides. Use a fork or tongs to turn the pieces.
Turn the sauté setting off.
Add in the beef consommé, beef broth, butter, ranch seasoning, sliced sweet onion, pepperoncini juice and sliced pepperoncinis. Use a large spoon to stir it all together.
**Special note - I use the Better Than Bouillon Beef soup base in place of the beef broth. I use the beef consommé can, fill it with water, pour it into the pot. Then, put a heaping spoonful of the soup base into the pot.
Fasten lid on top and lock it. Make sure the vent is closed. Set it to cook for 40 minutes. It will take a few minutes to build up the pressure before it starts cooking.
While it is cooking, slice rolls in half. Spread soft butter or mayonnaise on each open faced half. Place the prepped rolls on a baking sheet. Slide the sheet into a 350 degree oven and toast for 5-6 minutes.
When the timer on the pot goes off, carefully flip the vent cover to the side to release the steam. Once the steam is done, remove the lid.
Remove the beef pieces to a large cutting board and use a couple forks to shred and pull apart the meat. Place the meat in a serving bowl. Use a large slotted spoon through the pot to scoop out the meat, onions and peppeoncinis. Add these pieces to the serving bowl with the shredded beef. Stir the onion and peppers in.
On a warm toasted roll, lay a slice of provolone or other cheese on one side. On the other side, pile on the shredded beef mixture. Smooth both sides of the sammie together. Ladle some of the hot liquid from the pot into a small bowl for dipping the sammie if you wish. We highly recommend.