Place a fry pan on a medium to high heat and place the coconut oil, salt, maple syrup, vanilla extract and walnuts into the fry pan and fry for five minutes. Stir constantly so the walnuts don't burn.
Pour onto non stick paper and spread out to allow them to cool completely while you make the caramel.
Caramel;
Place the condensed milk, golden syrup and butter in a saucepan on a medium heat and allow them to melt together.
Once it has all come together take off the heat and add the vanilla extract.
Allow to cool slightly while you prepare the oat slice.
Oat Slice;
Preheat the oven to 180°C (350°F) and line a 9"x13" baking tin with baking paper.
Place the brown sugar in a bowl and mix in the melted butter.
Add in the eggs and mix.
Add the two flours, oats and coconut and mix until all combined.
Add in ¾ of the candied walnuts and stir through.
Press ⅔ of the mixture into the base of the prepared pan.
Top with the caramel and then crumble over the remaining oat mixture on top. Sprinkle over the remaining candied walnuts.
Place in the oven to bake for around 30 minutes. The top and sides should be a light golden colour.
Allow to cool completely before slicing. I like to cool mine in the fridge so the caramel slices nicely.