Airbus has divided stall recovery procedure in twp parts.
1. Recovery from stall.
2. Recovery of flight path
Recovery from stall is to first reduce the AoAThen level the wings if they are not.
Increase energy by adding required thrust
Check speed brakes retracted.
Slat extension is not a part of stall recovery but is part of flight path recovery.As you start raising the attitude extend the slat to increase stall margin to prevent secondary stall.
While performing the exercise in the simulator three problems are experienced.
First as you lower the nose to reduce AoA it rises as speed increases and if not held with forward pressure it triggers secondary stall warning.
Second as you start start flight path recovery of attitude change is fast it triggers secondary stall warning.
Third as you extend slat there is small margin to VFE so as speed increases rapid nose up triggers stall. What needs to be done is slow nose up but don't stop at 4to 5° but continue to 8 to 10° till trend arrow disappears. Confirm climb and retract slat.