Question: how to cook a frozen pork loin roast?
Answer: Put the fresh or frozen pork roast in the crock pot.
Sprinkle with desired amount of salt and pepper. ... 
Liberally sprinkle with poultry seasoning.
If not using frozen roast, add 1/4 to 1/2 cup of water to the bottom of the crock pot.
Cover and cook on high for 4 hours or low for 8 hours.