Spoon Nutella into a small zip lock bag, seal bag and snip off a corner. Squeeze into the cavity of each dates.Use as much or as little as you'd like. I used about 1 teaspoon for each date.
Sprinkle your choice of chopped nuts on top of the Nutella. I used different kind (chopped almonds / cashews / pistachios / shredded coconut) on each date to give variations. You can choose to use whatever you have on hand.
I know you are tempted to pop these bite size treats into your mouth, but I highly recommend refrigerating these for a few hours to firm up and and for the Nutella to soak into the dates.