Pistachio Macarons with White Chocolate Ganache

Name: Pistachio Macarons with White Chocolate Ganache
Prep time: 1 h
Cook time: 15 min
Total time: 1 h 15 min
Cuisine: French
Ingredients: 100 grams egg whites (room temperature); 1/4 teaspoon cream of tartar; 60 grams granulated sugar; 200 grams powdered sugar (sifted); 95 grams almond flour (sifted); 15 grams pistachio flour (substitute almond flour (see notes)); 3 drops green food coloring (optional); 226 grams white chocolate; 120 grams heavy cream