Place corned beef in a deep soup pot, and cover with cold water. Add seasoning, if using (some may come packaged with the meat.) Cover with cold water.
Bring water to a slow simmer, and cook on low for 50 minutes per pound.
20 minutes before meat is done, add potatoes.
When time is over, and the meat is fork tender, remove from heat. Allow the meat and potatoes to remain in the liquid in the pot.
Pour off some of the brine into another pot, bring to a boil, and add the cabbage, cut in wedges. Cook 5 minutes or until done to your taste.
Slice the meat across the grain, and serve with potatoes and cabbage.
Notes
Amounts are loose - this makes more than most families would eat in one meal, but leftovers are wonderful!