I make a nice roast in a crockpot and am hoping to find another crockpot recipe.  
Roast
Put roast, potatoes, carrots (optional), celery, 10oz. water, and approved seasonings into a crockpot on low for ten hours.  Then melt 3T butter and stir 3T potatoe starch into the melted butter.  Next, I put 10 oz. broth into a pan and add the potato starch mixture to make gravy.  This roast tastes great and saves a lot of time.
P.S.  I think potato starch is approved since the only ingredient is potatoes but I need to check with Matia.