Before you can boil yam, you need to make sure you have the yam,a clean water, clean pot, and a clean knife.
The first step is to add enough clean water to the pot and cover it then put it on the source of heat, The next step is to peel the back of the yam, cut it to your desired size and rinse it with clean water in a neat bowl, then put them into the pot and add a little salt (optional), cover the pot with it's cover.
After some minutes, use a piece of neat broom to check if it's done by pressing it into the yams, if you feel that it was soft when you pressed the broom into it then it's done.