Pasteli me fistikia (pistachio and honey candy)

1. Peeli and place pistachios on a baking sheet, the put in a slow oven (250°F) to roast for 20 minutes.
2. Remove from the oven and cut into quarters.
3. Meanwhile combine the sugar, honey, and water in a heavy pan, and stir over medium heat until dissolved.
4. Lower the heat and boil to the very firm stage (250 to 256 degrees), toss in the pistachio nuts and stir, then remove from the heat.
5. Butteri or oil a marble slab, jelly roll, or any aluminum pan and quickly spread the candy using a spatula or knife.
6. Allow to cool, the cut into squares and store in covered containers.