In the bowl of a food processor, pulse the dates, nuts and salt until well blended and coarsely ground - you should be able to squeeze it together in a clump. If you like, pulse or stir in any add-ins.
Press into a parchment-lined 8x8-inch baking pan and let sit at room temperature or refrigerate until easier to cut into bars. (Alternatively, roll the mixture into small bite-sized balls.) Leave in the pan or wrap individually to store.