How can I make a rotator move to a position overtime?

I wanta rotator to move to a position but not snap there immediately but instead move there smoothly. For example I press a button for a camera to lock on to a target but instead of immediately rotating to face the target, it rotates toward it at a set speed or a given time frame. How can I do this in blueprints?

Use Timeline + lerp node if you want to control the exact length of the camera transition.