I think that should work, yes. Just bank the aircraft to a reasonable bank attitude and engage the autopilot. It should use ATT (attitude hold) in pitch and roll.
Or use hdg and keep the heading bug turning. You can also assign it to buttons or key commands. When ever the plane wants to level out, hold the button for 10s or so.
Jan, it's a good idea to assign the hdg to a button, I didn't think about that. I usually do not assign ap functions.