This pistachio and lemon cake is a refreshing and flavorful dessert that is perfect for any spring or summer gathering. The cake is made with a combination of pistachio flour, almond flour, eggs, sugar, and butter. Once baked, the cake is topped with a sweet lemon glaze made with powdered sugar, lemon juice, and lemon zest. Serve it with a cup of tea or coffee for a delightful treat.