ñame- yam. Should have posted the old Spanish word earlier.

When we find a good plump yam, we microwave the greased tuber on high for about 5 minutes per pound, stopping to turn it over at the halfway point. If not cooked enough, add a couple of minutes more time. It is much better to add time incrementally rather than ruining it by cooking too long.
Remove the skin and mix in butter. Yum!
It seems a sacrilege to make pie with good yams when butter is sufficient for a princely dish. Serve with a slice of smoke-cured ham and biscuits or corn bread- hard to beat!