Slice the top of each date enough so that you can stuff it, but not all the way through the entire date.
Fill each date with ½ teaspoon - 1 teaspoon of peanut butter depending on the size of the date. *For best results and easy filling, transfer the peanut butter to a pastry bag.
Sprinkle the crushed peanuts over the peanut butter. Gently push the sides of the dates together to secure.
Freeze the filled dates for 10-15 minutes.
While the dates are freezing, melt the chocolate. Transfer the chocolate chips to a heat-safe bowl. Place the bowl over a small pot with about 1 to 2 inches of simmering water (double-boiler). Melt the chocolate, stirring frequently.
Once melted, carefully remove the bowl from the pot {using an oven mitt, the bowl will be hot}. Place the bowl onto a kitchen towel.
Line a cooling rack or sheet tray with parchment or wax paper. Using a fork or candy utensil, dip each date into the chocolate to coat. If there is chocolate remaining, drizzle each date with chocolate.
Sprinkle with flakey sea salt (or additional crushed peanuts).
Chill the dates in the fridge for 30 minutes or until the chocolate is set.