Mississippi Roast in the Crock Pot

I know this recipe is all over the internet but I came upon it on a knitting group that I belong too on Ravelry.  If you are not a knitter or crocheter then you do not know what this group is.  Basically it is a facebook for knitters and/or crocheter's.  So here is the recipe, it is so simple it is scary.

Ingredients:
3-4 lbs of Chuck Roast
1 package of Ranch dressing
1 package of Au Jus
4-5 Pepperconini's
1/2 Onion sliced
1 cube of butter (unsalted if possible), sliced into about 3-4 chunks

In your crockpot, layer first your sliced onions, then add your chuck roast.

Then spread on top of the chuck roast, the ranch dressing and au jus.  Add the butter on top of all of this, then put about 2-3 pepperconini's and spread a couple more on the bottom of the crock pot.

Set your CP to low and cook for about 8-10 hrs.

When it is all done, you can take out your meat and add a little bit of cornstarch to make some gravy in a separate pan

Note: I was able to find ranch dressing and au juis that is MSG free, otherwise if you can't find that, DO NOT add any salt.