How do I mount another system's zfs root partition on new system?

[Magnus Ahriman]

Hi all,

I've recently installed a new system due to disk- and other problems. Now I
want to mount the old system's zfs root on my new system (under a different
path/not as actual root).

What are the actual steps/commands to mount the old zfsroot under a
mountpoint in my new system?
The root partition was encrypted, will I be asked to enter password upon
mounting it?

Best regards,
Magnus Ahriman