My killer technique to distribute the pistachios evenly: I place each dome on a square of baking paper 3cm larger than the dome. I spread a lot of sliced pistachios around the dome, then I carefully lift the edges of the paper to stick the pistachios around the base. Then I just have to take the dome off the paper, and transfer it to a plate. I can collect all the extra pistachios and use them for the next dome.