Place the thinly sliced meat in a bowl and pour over the marinade mix well gently massaging into the meat.
Add the sesame oil only now and mix some more into the meat.
Cover the bowl with cling film or cover with a lid if there is one stand for 4 hours in the fridge or overnight is ideal.
Pre-heat a frying pan on medium heat add the oil spread then quickly add the meat and any optional vegetables. Cook 3 to 5 minutes or till everything is cooked to your desired doneness.