Depends on your distribution obviously. They don't all have the same naming. It sounds like a Debian derivative here of course but there's still many of those.

But it's normally a meta package with a huge amount of packages, you'll have to list them individually unless your distro has a meta package with a specific minimum install or something.

But anyway look in the package catalog for your distro, it should be in there.

And WeaponG's solution is really great if there isn't a minimal package.

I find it easier to install the entire desktop and then uninstall the particular apps that I don't like/need.

You might try installing just one of the apps for that DE that you do want and let it pull in the dependancies... that might result in a leaner install.

Try installing just plasma-desktop