Put the pistachios in a food processor and pulse until finely ground. Add the mint, garlic, lemon zest, red pepper flakes and 1/4 teaspoon salt and pulse until finely chopped. Add the Pecorino-Romano and pulse to combine. With the motor running, slowly pour in the oil and process until combined. Transfer to a bowl and stir in the olives.
Copyright 2016 Television Food Network, G.P. All rights reserved.