Cut off hard green ends and root end of Leek
Make one cut lengthwise
Slice Leeks about ⅛" width discs
Put in colander and wash thoroughly
Pat dry pieces with paper towel
In a large oven safe saucepan, melt butter
Add cut leek pieces and saute on medium low until tender
While leeks are sauteeing, cut small potatoes into quarters (bite size pieces)
Add to pan, stir around getting potatoes very wet.
Place in oven and bake for 45 min - to an hour - until the potatoes are tender.
Salt & pepper to taste
Serve immediately