Robyn's French Dip (crockpot)

from Robyn E.

1 boneless roast
1c water
1 pkg. Manwich seasoning mix
1 pkg Augus mix

Put in crock pot. Cover and cook on low for 6 hours. Add water if dry. Slice and serve warm. Toast buns on grill. Top with mushrooms and swiss cheese which has been melted slightly.