How to make a user menu in ubuntu 22.04 so I can either continue to Ubuntu or start Clonezilla stand alone I looked for example but couldn't find it

I have Ubuntu desktop 22.04. I also use Clonezilla, but it is started from a USB stick.Now I'd like to start Clonezilla from a partition on my hard disk with a custom menu. I'd like to have a menu at startup that is 1: continue to Ubuntu and 2: start Clonezilla standaloneI tried, but it says it cannot find the user menu.