• Press the SAUTE button on your Instant Pot and allow it to heat up.
• Add 2 Tablespoons of olive oil to the bottom of the Instant Pot.
• Generously sprinkle salt, pepper, and garlic salt on all sides of the pot roast.
• Place roast in hot oil on a skillet and let it sear on that side for 2 minutes. Flip the roast over and sear the other side for 2 minutes.
• Depending on the shape of your pot roast, you can sear the other sides if you choose. Press CANCEL button to turn off the saute feature.
• Remove the roast from the Instant Pot and place on a plate.
• Pour 1/2 cup beef broth into the bottom of the Instant Pot and with a wooden spatula, scrape the burnt brown bits off the bottom of the pot (this is called "deglazing" and will keep you from getting the burn notice when it cooks).
• Place roast back into Instant Pot. Add onion, carrots, and celery and spread all around the roast.
• Add garlic on top of roast and vegetables.
• Pour in the beef broth, being sure not to pour it directly on the roast  or vegetables because you just cooked them in delicious flavors. Try to pour the beef broth on the sides as much as possible.
• Pour the Worcestershire sauce, balsamic vinegar, and soy sauce directly on the roast. Sprinkle thyme and rosemary evenly around the meat and vegetables.
• Place the lid on top of the Instant Pot and move the valve to SEALING. Press the PRESSURE COOK (MANUAL) button and set timer for 80 minutes (or 20 minutes per pound, depending on the size of your roast).
• When the timer is done, let the pressure do a NATURAL RELEASE and then let the roast sit on warm for at least 1 hour (I sometimes will let it sit on warm in the Instant Pot for 3-5 hours, just to let it really get tender).
• Remove roast from Instant Pot and slice into pieces (it should pretty much fall apart by this point).
• Serve with mashed potatoes and the cooked carrots on the side.

If you want to make gravy . . .

• When the roast is done cooking, use a baster (or whatever method you want) to remove the liquid from the Instant Pot.
• To make gravy, you will want to get at least 3 cups of drippings from the Instant Pot. If you don't have quite enough drippings, you can supplement with a can of beef broth or beef stock (I like to use beef stock for gravy because it's a little more flavorful).
• Place a small saucepan on the stovetop over medium heat.
• Add butter to the saucepan and let it melt.
• Add flour and use a whisk to whisk flour and melted butter together until it makes a paste (takes about a minute).
• Pour in the drippings, whisking the entire time.
• Cook for about 4-5 minutes minutes or until the gravy reaches the thickness you prefer.
• Serve roast with gravy on top and on top of mashed potatoes.