In a large mixing bowl combine oats, salt and optional add-ins of choice.
With the metal blade fitted, place dates in the food processor and let the machine run until dates form a ball (see picture in post). If your machine is having trouble running (this happens sometimes if the dates are particularly hard), feed the dates through the feeding tube little by little. Be patient; in my processor this takes a little under a minute and a half. Transfer the ball of dates to the mixing bowl with the oats, scraping any extra date paste off the side of the work bowl with a spatula.
In a small saucepan, gently heat honey and nut butter of choice over meduim low heat until warm (about 2 mintues). Add to mixing bowl. Mash and mix all ingredients until well combined (I start by using a fork and then once it is combined, I finish the job with a potato masher; you could also use your hands).
Line a 9.5 X 13 pan with parchment paper (so the bars lift out easily). Transfer mixture to pan and using a fork (or potato masher, heavy bottomed glass, your hands etc.) spread it out, packing down tightly (this is important so that they don’t fall apart), until you have a uniform thickness (mine are usually a little under a ½ inch thick). The mixture may not reach all the edges of the pan; if this is the case just form smooth edges with a fork.
Cover and place in the freezer to set for 20 minutes. Cut in 15 bars. Store in the fridge in an airtight container with parchment paper in between bars to prevent sticking. These can also be frozen.