Heat oven to 350 degrees. Rough chop the pistachios into small pieces, blend the egg whites and combine all ingredients in a large bowl. Mix well with a rubber spatula.
Use a nonstick baking sheet, or line a baking sheet with parchment paper. Wet your hands and make small piles of the mixture, each 1 to 2 tablespoons; place on sheet about an inch apart.
Bake until firm to the touch and lightly browning on edges, about 30-40 minutes. Remove baking sheet and cool for at least 30 minutes before eating.
Recipe by Eileen Z. Fuentes at http://www.eileenzfuentes.com/2012/03/ooey-gooey-coconut-pistachio-macaroons/