How to properly boil egg white? I am trying to boil egg white. It's around 500gr. How to boil it properly? 

In previous attempt, I boil it using a stainless steel container with no lid and put it in a pan filled with water. I screw up since the water is able to reach the egg. This method also time consuming because the container is not hot enough. It also hard to clean after I do this.

Are there better method for me to do this? The method should ensure the egg safe to eat (no salmonella). I dont want to use plastic to boil it.
You could microwave it, put the whites in a glass container with a loose lid and blast it, the texture will be very similar to a boiled egg. You might have to check from time to time for doneness.

It will harden in the shape of the container if you don't "scramble" it every 30s, and it might also explode from the steam trying to escape (hence the cover). Brush some oil in the container to make sure the whites don't stick.

Personally for that much egg I'd just cook them in a pan like an omelet, it's much less trouble.