I would suggest most UA events are self inflicted rather than caused by some malfunction of the machine. No matter how you get into the situation....the recovery procedure should be pretty straight forward I should think.
Stop Turn, Wings level, Climb Pitch attitude, climb power....stabilize Airspeed at Vy or higher.
Dropping the Auto Pilot but retaining SAS and Attitude Hold function would also be a good move I should think.
Once the recovery is complete and the aircraft is back under control....reverting to using the Auto Pilot would be my next move....unless it was an Autopilot malfunction that caused the upset.