Crockpot Brisket (Low carb, S)

1- (4 to 6) pound trimmed brisket

2 tablespoons prepared mustard (that's right just the regular kind)

2 teaspoon beef base (I use Organic Better than Bouillon -regular is available at Wal-Mart and other stores) dissolved in 1/4 cup warm water with the dried onion added in

3 teaspoons dried onion or 1/2 cup chopped onions

Use THM Baking Blend to thicken the gravy or leave it au jus if you prefer.  (I left this brothier than my usual gravy and used 2 tablespoons blend per cup of meat juice. *See gravy tips at the end of this post.