Melt the butter over medium heat in saucepan.
Add brown sugar, corn syrup & salt.
Bring to a very low boil, stirring constantly.
Let cook over very low heat, stir in oats, vanilla & pears.
Remove from heat.
Let sit to cool until thickened- about 10 minutes.
Pour over shortbread in pan.
Transfer to refrigerator & allow to completely cool before cutting- at least 2-3 hours.
( I was way too impatient with these & tried to remove before cool. It was a sloppy mess)