For those of us who feel that cooking for others "completes" us, a pot well done has many meanings...
To a health expert, 'well done' means the absence of parasites and the dangers of illnesses caused by eating under-cooked food.
But to a cook like me, a 'Pot Well Done' means, everyone loved the meal and went away wishing I had made more! that's when we pat ourselves on the back and say, "well done"!