Preheat the oven to 180°C.
Melt the butter in a small pan, let it cool.
Meanwhile, grease and line a loaf tin.
In a large mixing bowl mix the flour, sugar, salt, baking powder, raisins and orange zest.
In a separate bowl mix the yogurt, cooled butter and eggs. Add this to the flour mixture and stir it into a smooth batter.
Transfer the batter to the tin, spread it out evenly.
Bake for about 40 minutes until golden brown.
Meanwhile, warm up the orange juice with the honey and chop up the pistachios.
Remove the cake from the oven, test that it's cooked through then pierce the top several times and pour over the glaze. Scatter the nuts on top and let the cake cool in the tin.