The ingredient assortment is widely based on personal preference, but often includes toasted hazelnuts or chickpeas as a nut base, along with spices (such as coriander, cumin, sesame seeds, or za'atar). The mixture is ground together to form a coarse powder.
The powder is then used as a seasoning (for lamb stew), a dip (along with olive oil for pita or bread), a crunchy coating for baking protein, or a topping on salads. Have you ever tried dukkah?
Source: Flickr User jules:stonesoup