Season the roast with salt, pepper and garlic on all sides. Lightly cover in flour. Set your pressure cooker to the sauté setting on high.
Drop-in a tablespoon of butter and spread it around the bottom surface.
Sear each side of the roast for about 2 minutes to create a brown crust. Another tablespoon of butter can be added if needed.
Remove the roast from the pot. Use a silicone spatula to scrape off any burnt-on flour in the pot. Add a trivet to the bottom (mine came with a metal one)
Place the roast on the trivet in the pot. Add beef broth along with salt & pepper. The veggies will be added later. Switch the setting to Pressure Cook on high for 40 minutes.
Some of these machines come with different lids, make sure you have the pressure cooking lid on securely with the vent valve seal shut and press start.
Allow the machine to naturally release the pressure once the time has elapsed.
Add veggies to the pot along with the beefy onion or onion soup mix envelope. Set the time to 25 minutes on high to pressurize and hit start.
Remove roast and veggies to a serving platter, but leave gravy juices in the pot.
Whisk flour and water in a seperate cup until smooth. Using a spoon, test the consistency. Does the mixture have the consistency that you would like in your gravy? If not add one more tablespoon of flour and whisk to desired thickness.
To thicken the gravy, adjust the setting to sauté. Add half the flour mixture, stir and check consistently. Add more of the flour mixture if needed. Go slow with this step.