Preheat oven with racks in the center to 300F. Then line two baking sheets with parchment paper. In a small bowl, combine the brown sugar, salt, rosemary, and sesame seeds.
Now, in a large bowl whisk the egg whites a bit (just to loosen them up). Add the walnuts, and figs to the whites and toss until they are evenly coated (it will take a minute or so). Sprinkle the sugar-spice mixture over the nuts and toss (really well) again.
Split the nuts between the two prepared backing sheets in a single layer, separating them the best you can.
Bake for ~25 minutes or until the walnuts are toasted golden and the coating is no longer wet. Cool for a few minutes, then slide the parchment/nuts off the hot baking sheets onto a cool surface to cool completely. These will keep for a week or so in a an airtight container or baggie.
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