Add peanut butter to the middle of the date and squish gently to close. Put in the fridge.
Melt chocolate in a heatproof bowl over a pot of water, or in the microwave.
Take the dates out of the fridge and cover with melted chocolate. Sprinkle with flaky sea salt if desired, transfer back to the fridge and let set for approx. 15 min. Store in the fridge and serve as a treat!