Cut the marshmallows in halves, and put them, one by one, cut side down, in chocolate fondant (as prepared for almond or cherry chocolate creams), melted over hot water and flavored to taste with vanilla. Beat the chocolate with the fork, that it may not crust over, lift out the marshmallow, turn it and, in removing the fork, leave its imprint in the chocolate; sprinkle at once with a little fine-chopped pistachio nut meat. To prepare the nuts, set them over the fire in tepid water to cover, heat to the boiling point, drain, cover with cold water, then take them up, one by one, and with the thumb and finger push the meat from the skin.