How do I boot Dietpi from an external usb ssd?

I have looked everywhere for an answer but couldn’t find an easy solution. Can someone please share their knowledge on how I can achieve booting Dietpi solely from an external usb SSD? Thanks.

How does it behave if you flash original RPi OS to your SSD?

I have not tried flashing original RPi OS to SSD yet. I am comfortable with Dietpi as installing software is so easy.

It was just for testing purposes. To verify how it will behave.

Which SBC hardware are you using?