1. Preheat oven to 325 degrees. Grind the saffron with a mortar and pestle until you get a fine powder.
2. Combine all the ingredients in a large bowl (reserve 1 tsp of the salt) and mix with a large spoon until all the pistachios are coated.
3. Spread the pistachios on a baking sheet lined with parchment paper. Roast in the oven for 20-30minutes, removing the pistachios from the oven halfway to add the remaining tsp of salt and move the nuts around with a spoon.
4. Keep the nuts on the baking sheet until they cool