Preheat your oven to 350°F (175°C).
Soak the dates in the hot water for about 10 minutes to soften. Drain the water.
Put all ingredients in a blender or food processor and blend until smooth. Add a little water if needed.
Spread the mixture in a buttered square pan (8x8-inch). Bake for about 20 minutes, until set. Allow to cool before frosting with the Ganache.