Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1                    pork roast
   1      package       dry onion soup mix
   1      can           cream of mushroom soup

Preparation:

Place roast in crock pot. Mix dry soup mix and the cream of mushroom together. Pour this over the roast. Cook on low for hours. (Time depends on size of roast) I have the large crock pot and usually my roast fills the crock, so it takes about 8 or so hours. When done, you will have a onion type gravy that is excellent on mashed potatoes. Hope this helps even though you do not marinade it. Enjoy!