1. Prepare 8-inch (20cm) square pan. Line with parchment paper.2. Place walnuts in the food processor and process for 20-30 seconds, until crumbly.3. Add pitted dates, cocoa powder, coconut oil, peanut butter, desiccated coconut, vanilla extract and salt. Process until combined and sticky.4. Turn the mixture out into the prepared pan. Sprinkle some sesame seeds. Use your hands or a spoon to firmly press the mixture into the bottom of the dish. Cover and refrigerate for 30 minutes.5. Remove from the pan and cut into squares or bas.