Place the soaked dates into the Thermomix bowl and blend 10 sec/speed 6. Scrape down sides of bowl.
Add remaining base ingredients and cook 5 min/50°C/speed 1.
Divide between 12 silicone cupcake liners and place into the freezer.
To melt the topping, you can use the Thermomix bowl or just the microwave given it is a small amount. Melt until just glossy, stir to complete the melting process and pour over the base. Divide a few roasted hazelnuts between the 12 servings.
These are best kept in the freezer. Remove just a few minutes before serving.