To recover, the flight crew could: 1) stop making manual electric trim inputs (which would stop resetting MCAS),
It would have been rather handy, if Boeing had mentioned that after the Lion Air crash. They were adamant that the pilots weren't trimming enough, though. Much commentary was made, here, about those little comments after AUTOPILOT-DISENGAGE, about getting the aircraft back in trim BEFORE cutting off the stab trim switches.
See "Evolution of Stab Trim Runaway Procedure",
737 Runaway Stabilizer Procedure