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If it's fully cooked you can either cook it long enough to heat it up, or just eat it cold.
A good rule is to cook until the internal temperature is 165 degrees or more.
how long to cook a fully cooked ham shank portion..cover or uncovered?
It is not necessary to cook a pre-cooked ham. A pre-cooked ham is good at room temperature, so you can leave it set out for an hour before serving. However, if you do decide to heat up your pre-cooked ham, just make sure you wrap it in tin foil, and watch it closely because you don't want your ham to dry out.
An unopened, cooked ham should be good refrigerated for 5 to 7 days.
The way to know if cooked ham is bad is by how long it has been in the fridge or freezer. In the fridge, cooked ham can last 7 to 10 days. In the freezer, it will last 6 to 8 months. Cooked ham that is bad will also develop a bad smell and may appear slimy to the touch.
Large pieces of meat, such as ham, should be cooked on the low setting. A 9 pound ham should be cooked on low for approximately 8 hours. Most hams are precooked, and this will ensure that the entire ham is at a safe temperature.
If the ham is fully cooked, there is no need to cook it any further. You could serve it just as it is...even cold. You may wish to heat the ham before serving it, but that shouldn't take very long in the oven, maybe an hour at 350 degrees. The crock pot could take a lot longer and would over-cook the ham.
20 to 25 minutes per lb at 325. Wrap loosely in foil to prevent drying out.
Up to 2 years.
This depends on how large the ham is. If the ham is already cooked, you are just looking to warm it up. Figure if the ham is around 10 pounds, it should take approximately an hour to warm up.
How long do I cook a precooked ham? It is 15 lbs. A precooked ham does not have to be cooked, but will taste better if you heat it thoroughly to an internal temperature of 140°F (60°C) or so. Place the ham in a 325°F oven (163°C). It will take 12 to 15 minutes per pound for a whole or boneless ham and 18 to 20 minutes per pound for a half ham.