In a small bowl add flour, salt, and pepper. Stir the salt and pepper into the flour. Cut and trim roast into small bite-sized pieces. Dredge beef pieces in seasoned flour shake off excess flour.
Instant Pot Directions
Set the Instant Pot to saute, add oil. When the oil has heated drop in several pieces of the beef. Cook seasoned beef on all sides until lightly browned. Cook beef in small batches. When all of the beef is cooked add it back to the Instant Pot.
Add 1 cup of onion, two teaspoons of Gravy Master, and beef stock. Place lid on high and cook for 15 minutes on high pressure. Release pot after cooking with either a quick release or a natural release.
Slow Cooker Directions
Brown the beef in a large skillet in small batches with some vegetable oil. Add the browned beef, beef broth, onion, and Gravy Master to the slow cooker. Cook for 4 to 6 hours on low.
If the liquid hasn't thickened up to your desired consistency, you can thicken it up by mixing 1 tablespoon of butter and one tablespoon of flour together. Stir this into the liquid and it will thicken up the gravy in the slow cooker.
Serving
Prepare noodles or rice according to package instructions.