Dust roast with 1 cup of flour, making sure to get all sides, then tap off any excess and place into the slow cooker on top of vegetables.
Cook on low for 5 hours.
Remove pot from base and partially open lid. Allow roast to rest like this for 30 minutes before serving. This a crucial step for keeping the roast moist, do not skip it.
Call your family and tell them it’s dinner time.

Pro tip: If you want more of a sauce to go with your pot roast, you can small dice the onion, carrot and celery. You will still have potatoes as great sides for your roast.