Make the basePreheat oven to 170C degrees.
In a food processor, add hazelnuts, oats, cacao powder and salt and blend until finely ground.
Add the dates and melted coconut oil and blend until the mixture resembles wet sand.
Press the mixture firmly into a lightly greased tart pan with removable bottom. Poke some holes into the bottom of the crust with a fork.
Bake in the preheated oven for about 10-12 minutes.
Cool down completely and place in the freezer whilst making the filling.
Make the blueberry layerDrain and rinse the cashews.
Place them in a food processor together with the rest of the ingredients and blend until completely smooth.
Pour over the blueberry layer.
Place in the freezer to set for at least 2 hours.
Remove from freezer a couple of hours before eating. Garnish with fresh blueberries, edible flowers, cacao nibs and coconut chips.
You can keep the tart in a closed container for up to 5 days in the refrigerator.