To make the dough, stir together the chia seeds and 3 tablespoons of orange juice and set aside to gel. Add the rolled oats to the bowl of a food processor and pulse into a fine but rough flour. Reserve 2 tablespoons of the flour and set aside. Add the sugar, salt, cinnamon, maple syrup, vanilla extract and coconut oil to the bowl and continue to pulse to combine mixture into a ball. Turn out the dough out onto a sheet of plastic wrap, form into it a round flat disk and cover it tightly with the plastic wrap. Refrigerate for 1 hour.