Macrium Reflect has an option to install a boot menu item for itself. It sets up dual booting, normal Windows 10 and the Macrium Reflect Free rescue environment. You should be able to boot into Macrium Reflect using the boot menu item, then recover just the OS partition from an image saved on a custom recovery partition. I don't know if it would be possible to automate that process with scripting or command line commands, though.

Adding a boot menu option for Reflect recovery - KnowledgeBase - Macrium Reflect Knowledgebase