Soak the dates in hot water for about 15 minutes, then drain.
Add the dates and all the remaining ingredients to a food processor and blend until a smooth mixture forms.
Line a 20 × 20 cm pan with baking paper, transfer the mixture into the pan and press it evenly with your fingers.
Place the pan in the freezer while you prepare the glaze.
For the glaze melt the chocolate and coconut oil using a double boiler.
Remove the base from the freezer, pour the glaze over it and decorate with orange zest and sea salt if desired.
Place the brownie back in the freezer for at least 1 hour, then cut into bite-sized squares (I got 24 pieces).
Store in the fridge or in the freezer. Enjoy!