My mom taught me how to make one of the best beef roasts ever! It's super easy to make, and really is wonderful. The roast will make a delicious gravy too--so make sure to make some mashed potatoes to go with it!
Place roast in roaster pan and sprinkle with vinegar, pepper, garlic powder and the onion soup mix.
Cover roaster and bake at 325º-350º for at least 3-4 hours.
The last hour of cooking I remove the lid to brown the roast a bit.
Then with the drippings, I make gravy (remove roast and cover with foil. Heat the drippings on the stove over fairly high heat. Add more water if necessary, and bring to a boil. Whisk in a slurry of flour and water (fairly thick) stirring constantly to avoid lumps. Adjust salt and pepper.).