Blanch the pistachios in boiling water for 30 seconds.
Drain and rub them with a clean kitchen towel to remove the skins.
Coarsely chop the nuts.
Heat the butter and olive oil in a frying pan.
Add the pistachios and sauté for a few minutes.
Add the gorgonzola and cream and stir until smooth.
Remove from the heat, add the chives and season with salt, pepper and freshly grated nutmeg to taste.
Bring a large pot of salted water to a boil and cook Delverde® Penne Rigate until al dente.
Drain and toss with the sauce.
Serve hot.