All I do is smash them with a fork. How easy is that? Start out with hard boiled eggs, cut in half lengthwise. Simply press the tines of a fork through the egg one way, then go back and do it again the other way.
This is great for when you need smaller pieces when you're making sandwich salads like tuna or chicken. You can use a serving fork if you want larger pieces, but I prefer a regular fork. Best of all, my hands stay clean! How awesome is that?
Have a great weekend!