Heat the oil in the Instant Pot's inner pot using the saute setting.
1 tablespoon olive oil
Flour the bottom round roast, rubbing it all over the meat. Shake off excess.
2.5 lb bottom round beef roast, ¼ cup all purpose flour
Sear each side of the meat until browned.
Remove the meat from the pot while you deglaze the pan using 1 cup of the beef stock or broth.
6 cups beef stock
Return the meat to the center of the pot. Add the vegetables all around the meat. Season with salt and pepper to taste.
6 small Yukon gold potatoes, 3 medium purple potatoes, 2 large sweet potatoes, 1 medium red onion, 2 cups baby rainbow carrots
Add the remaining beef stock or broth and the fresh thyme.
6 cups beef stock, fresh thyme, kosher salt and black pepper
Double check the sealing ring, then twist on the locking lid.
Cancel the Saute setting and select Meat/Stew setting for 45 minutes.
When the pressurized cook time has ended, the pot will beep a few times. Allow the Instant Pot to natural pressure release (NPR) for about 30 minutes.