Using a sharp knife chop the kataifi into small pieces.
4 ounces kataifi
In a skillet, over medium heat add the butter and chopped kataifi.
2 tablespoons butter
Stirringly constantly, toast the kataifi until it turns deep golden brown. Should take about 15-20 minutes.
Remove from the heat and into a bowl. Let it cool down slightly and add the pistachio cream and tahini.
½ cup pistachio cream, 1 tablespoon tahini
Reserve a few pieces of the chocolate and add ¾ cup of the chocolate into a silicone or plastic bowl. Microwave for 30 seconds and stir with a spatula.
2 cup semi-sweet chocolate
Microwave again for another 30 seconds and stir. The chocolate will begin to melt, make sure to mix it well.
Microwave for 15 seconds and stir. Add 3-5 pieces of the reserved chocolate. Stir well. The chocolate you added should have melted easily and the chocolate should be liquid.
If the chocolate is still too thick, microwave it for 5-10 seconds and stir.
Once the chocolate has a nice fluid texture, add a thin layer to the silicone mold, make sure to add some on the sides of the mold as well.
Allow the chocolate to set at room temperature for 15-20 minutes.
Add a layer of the pistachio and kataifi mixture into the mold. Leave a thin space to add the second layer of chocolate once the pistachio layer is set. Place it in the fridge for about 10 minutes.
If your chocolate has harden now, microwave in 15 second intervals until it is liquid again.
Add the last thin layer of chocolate to the mold and allow it to set.
Let the chocolate bar rest for 15-20 minutes at room temperature until the top chocolate layer is set.
Remove from the silicone mold carefully and place over a piece of parchment paper.
Repeat the process for the second bar if you only have one mold.
Chocolate bar is ready to enjoy!