Line a loaf pan with parchment paper or spray with non-stick cooking spray.
Open and lay the dates in a single layer on the bottom of the dish. Cover with a piece of parchment paper and use the bottom of a glass to press the dates flat.
Spread the peanut butter over the top of the dates.
Top with a sprinkle of salted peanuts.
Melt the chocolate in a microwave-safe bowl at 30-second increments, stirring between each, until fully smooth.
Pour the chocolate over the ingredients, covering them entirely.
Top with sea salt or more peanuts if desired.
Freeze completely, at least 8 hours, before cutting into bars with a sharp knife.
Store in an airtight container in the fridge or freezer.