This pistachio and orange cake is a bright and citrusy dessert that's perfect for a spring dinner party. The cake is made with ground pistachios, flour, sugar, baking powder, salt, eggs, milk, oil, and orange zest. The orange zest adds a tangy and refreshing flavor to the cake, while the pistachios give it a nutty crunch. The cake is topped with a simple orange glaze made with powdered sugar and orange juice. Serve this cake with a glass of sparkling wine for a festive and celebratory dessert.