A rich, crumbly Middle Eastern confection made from ground pistachios and tahini, sweetened with sugar or honey. A sophisticated dessert that's both dairy-free and gluten-free.
Place the shelled pistachios in a food processor and pulse until finely ground. Set aside.
In a saucepan, combine the granulated sugar and water over medium heat. Stir until the sugar dissolves.
Allow the sugar syrup to come to a gentle boil, then reduce the heat to low and simmer for about 5-7 minutes, until it slightly thickens. If using a candy thermometer, the temperature should reach around 240°F (115°C), or until it reaches the soft ball stage.
Once the sugar syrup is ready, add the ground pistachios, sesame paste, and optional ground cardamom and rose water to the saucepan.
Stir continuously over low heat until the mixture thickens and begins to pull away from the sides of the pan, forming a dense, fudgy consistency. This process usually takes about 10-15 minutes.
Remove the halva mixture from the heat and transfer it to a greased dish or mold. Smooth the top with a spatula.
Allow the halva to cool completely at room temperature or in the refrigerator for a few hours until set.
Once cooled and set, cut the halva into squares or diamond shapes.
Garnish with chopped pistachios if desired. Serve the pistachio halva as a sweet treat or dessert.