Pot Roast - Instant Pot

3-4 lb. chuck roast 
1 medium onion
1-1/2 lbs. potatoes, either B sized or large potatoes cut into eighths 
2 cups beef broth, or a combination of broth and red wine 
Salt & Pepper
Olive oil

Turn Instant Pot onto sauté, add a drizzle of olive oil. Season the roast with salt and pepper to your liking and add to the pot, allow to brown on one side, then turn it. Add the onions and potatoes, pour broth over everything and seal the lid. Turn pot to cook on high pressure for 90 minutes. When finished, release pressure and serve.