Press the reserved whole pistachios all around the outside of the meringue / Put into the pre-heated oven and immediately reduce heat to 250º / Bake for 1 1/2 — 2 hours until it's crisp on the outside and marshmallow - like on the inside / Remove from oven and allow to cool completely / If serving same day, cover lightly with plastic wrap / If
serving the next day wrap the shell airtight in plastic wrap and store at room temperature.