To make square hard boiled eggs, you'll need an Egg cuber or Square Egg Press. (See note in About section on where to purchase)
First boil your eggs, then slide the egg inside the press and screw the top down so it pushes the egg into the corners.
Let the egg cool and remove it from the mold. For better results use medium size eggs.
If you intend to prepare this for a party, I suggest you buy several cubers, this way you can boil and chill several eggs at a time, or it will take you a lot of time.
To prepare hard boiled eggs, place eggs in a saucepan, cover with cold water and bring to a boil over medium heat. As soon as the water comes to a full boil, let the eggs boil for 5 minutes, and then remove from heat and let stand covered in hot water 10 minutes .
Filling is made with cream cheese, ham and egg yolk, it tastes very soft, it is ideal for kids.