[gentoo-user] ...recreating exactly the same applications on a new harddisc?

Hi,

I am currently preparing a new harddisc as home for my new Gentoo
system.

Is it possible to recreate exactlu the same pool of
applications/programs/libraries etc..., which my current
system have - in one go?

That is: Copy <something> from the current system into
the chroot environment, fire up emerge, go to bed and
tommorow morning the new system ready...?

Does this <something> exists and is it reasonable to do
it this way?

Thanks for any hint in advance!
Stay healthy!
Cheers,
Meino