Preheat your oven to 180 degrees celsius or 375 Fahrenheit
In a medium bowl, mix the oats, chia seeds (if using) and cinnamon
Add the coconut oil or melted butter apple purée and egg (if usuing ), mix to combine
Line a baking tray (I use a 20 centimeter square cake tin)
Press the mix into the bottom of the baking dish so that it is an even layer, it should be around 1.5-2cm thick
Bake at 180 degrees celsius or 375 Fahrneheit for 25 mins, it should be firm to the touch but not hard
Cool and slice into squares
