This hazelnut and lemon cake is a delicious and refreshing dessert that is perfect for summer. The cake is made with ground hazelnuts and lemon zest, giving it a nutty and citrusy flavor. To make the cake, you will need hazelnuts, flour, sugar, eggs, butter, baking powder, lemon zest, and lemon juice. This cake is perfect for those who want to enjoy a light and refreshing dessert with a nutty twist.