Place thawed roast in a large pot (that can go into the oven). Sprinkle 1 pkg of lipton onion soup mix over the top and just enough water to wash it off a little. You can even slice a real onion to add to it, if you like onions. This is also great using a cream soup (mushroom, onion, golden mushroom, etc.) instead of water.
To Bake in oven: Cover pot with lid. Bake at 325º for 3 hrs.
Crock pot: Cook on low for about 4 to 6 hours.
Roast Beef Gravy:
Take the drippings from your roast. Place in a small sauce pan. Bring to a boil. Add thickener to it. You can add a little water if it is real strong. Or you can add a beef bouillon cube if it is too weak.