Adding Baseline Data to new tasks in Planner Premium?

Hey everybody! 

I was wondering if anyone knew if it was possible/how to add Baseline data to tasks added to a premium plan after the Baseline has been set?

E.G I set a baseline, and then more Tasks are added, but they generate with no Baseline (understandable)

I would like to have new tasks have a Baseline, but I don't want to set a new Baseline as the older tasks need to keep their original baseline dates. 

any help or suggestions would be fantastic!