Marinate overnight in fridge after mixing well (MUST) is the best
Roll out patiently and making sure it's as even as you can manage.
Dried in the sun to the point where it is just firm enough to peel and handle without breaking. Over drying means tough bak kwa
Best to BBQ
Wait for it to cool completely before packing.
Can be kept frozen in your freezer. To eat just let it defrost in your fridge and eat the next day.