1. Preheat the oven thermostat 7 - 210 degrees.
2. Slice the Croissant lengthways.
3. Spread the butter on one side. Put in the oven for 3-5 minutes until golden.
4. Meanwhile, toss the arugula, dried ham, dates and pine nuts together.
5. Portion the nut mixture in the Croissants and close them to create this warm Croissant sandwich.
6. Enjoy!