Preheat the oven to 300°F. Line a baking sheet with parchment paper and set aside.
In a medium bowl, combine the rolled oats, nuts and sesame seeds. In large bowl, whisk together the tahini, date syrup and olive oil. Add the oat, nut and seed mixture to the wet ingredients and stir until all the dry ingredients are lightly coated.
Pour the granola mixture onto the reserved parchment-lined baking sheet and spread into an even layer. Sprinkle the top of the granola with the fleur de sel and then lightly press the mixture down (compacting the granola gently will help create clusters in the finished product).
Bake the granola for 20 minutes. Remove the granola from the oven, stir gently and press the mixture down again. Return the the oven and bake until golden brown, about 20-25 more minutes.
Let the granola cool completely on the baking sheet. Gently break apart the cooled granola into clusters. In a large bowl, mix the granola with the chopped dates. Store the finished granola in an airtight container in a cool, dry place for up to a month.