In a bowl, combine oats, flour, brown sugar, cinnamon and salt
Add melted butter and mix until crumbly
Press two-thirds of the mixture firmly into the base of the tray
In another bowl, mix mashed banana, diced apple, honey and vanilla
Spread the fruit mixture evenly over the base
Sprinkle remaining crumble mixture over the top
Bake for 25–30 minutes until golden
Cool completely before slicing into bars
Notes
Lunchbox winner — feels like a treat but made from real ingredients
Holds together well, no mess in the lunchbox
Can add a spoon of passionfruit pulp to the filling for a twist
Keeps in the fridge or freeze for the week ahead