01 - Place the pitted Medjool dates in a food processor and pulse until finely chopped and sticky, scraping down the sides as needed.
02 - Add pistachios, rolled oats, cocoa powder, and sea salt to the processor. Blend until the mixture resembles coarse crumbs and is well incorporated.
03 - Pour in vanilla extract and melted coconut oil. Blend until the mixture comes together into a slightly sticky dough. If too dry to hold together, add 1 teaspoon of water at a time until it binds when pressed.
04 - Scoop heaping teaspoons of the mixture and roll between your palms to form smooth balls. Arrange on a parchment-lined baking sheet, spacing evenly.
05 - Refrigerate the shaped truffles for 20 minutes until firm enough to handle without losing shape.
06 - While truffles chill, place chopped dark chocolate in a microwave-safe bowl. Microwave in 30-second intervals, stirring thoroughly between each, until completely smooth and melted.
07 - Using a fork, dip each chilled truffle into the melted chocolate, lifting and letting excess drip off. Return to the parchment-lined tray.
08 - Immediately sprinkle the top of each chocolate-coated truffle with finely chopped pistachios before the chocolate sets.
09 - Refrigerate for 10 additional minutes until the chocolate coating is completely firm. Store in an airtight container in the refrigerator.