Note to Self:
Create a VM in proxmox GUI with HDD and RAM requirement
log onto proxmox shell
cd to /root
download latest image from mikrotik site
wget https://download.mikrotik.com/routeros/6.47.7/chr-6.48.img.zip
unzip chr-6.48.img.zip
if you dont know where your VMs are stored try
pvesm list
when you have location of VM disk you create in the GUI run the following command
dd if=chr-6.48.img of=/dev/pve/vm-1XX-disk-0
done