UEFI Laptop - is grub needed?

I bought a laptop with Elementary OS about 3 months ago, its good but some really silly things missing, like no minimise button!! I know it can be added but I if I am tweaking things, might as well go back to Gnome.

I have read that UEFI can launch Linux without grub so it should be left out - but can't find much more than that. (Only have 1 laptop so quite hard to figure it out by trial and error as I always need it)

Does anyone know how this is done?

And if you can still enter recovery...

UEFI Laptop - is grub needed?

UEFI Laptop - is grub needed?