Whisk all the ingredients (except orange blossom water if using) in a small pot away from the stove.

Once fully incorporated, bring the pot to the stove and turn the heat on medium-high, whisking constantly until it starts to thicken and boil. Whisk for 30 seconds more until really thick.

Immediately pour into a bowl and cover with plastic wrap, making sure the plastic wrap touches the top of the ashta.

Let come to room temperature, then refrigerate to set for at least one hour.