how long does it take to cook a pork roast in the crock pot on high
1 Or put a pork roast, 3 medium carrots peeled and cut into chunks, 1 onion quartered, 3 celery stalks rinsed and cut into crock pot with 1 cup water, salt pepper to taste. 2  Cook on low and slow for about 6-8 hours.3  If you want variations you can add 2 cans ginger ale and a shot or two of port wine.ut a pork roast, 3 medium carrots peeled and cut into chunks, 1 onion quartered, 3 celery stalks rinsed and cut into crock pot with 1 cup water, salt pepper to taste. Cook on â¦ low and slow for about 6-8 hours. If you want variations you can add 2 cans ginger ale and a shot or two of port wine.