I haven't fully tested the shelf life but over time the uncovered ones may start to "melt."
In this photo you also see dipped marshmallows covered with chocolate that's mixed with shredded coconut. mmmmmm
Step 1: Follow this recipe
Note that it has raw egg whites but when heated over 140 degrees, this becomes safe.
You should have on hand
-a very good mixer, preferably those big Kitchenaid types
-a pound of walnuts
-a pound of good quality chocolate
-a couple of trays or at least counter space
-a microwave or stove (if you need to double boil the chocolate)