Pre-heat oven to 350F. Oil a 6-cup non-stick muffin tray and set aside.
Place applesauce, coconut oil, maple syrup, vanilla, and salt into a medium mixing bowl and use an immersion blender to blend the mixture into a smooth consistency {or blend all the ingredients in a regular blender and then pour into a mixing bowl}. Add coconut, tapioca, and cinnamon and mix well using a wooden spoon until everything is thoroughly combined.
Divide the mixture evenly between the 6 cups in your muffin tray. Use your hands to press the mixture down along the bottom and up around the walls of the pan cups forming the crust. Set aside.
Prepare chocolate mixture by stirring all ingredients together -- keep stirring until the mixture becomes completely uniform and all clumps are dissolved. Pour this mixture into each tart shell, dividing equally.
Top each tart with an orange slice. Stir the maple syrup, cinnamon, and olive oil together in a small bowl. Brush this mixture over each orange slice.
Bake in a pre-heated oven for about 15 minutes until the tart shells firm up and the edges brown up a little. Remove from oven and allow the tarts to cool on a wire rack. Once cooled, VERY carefully remove tarts from the pan and transfer onto a serving plate or glass container {they are a little delicate at this stage, so take extra care not to break the shells}. Prior to serving, top each tart with a basil leaf and enjoy! Store leftover tarts in the fridge.