This lemon raspberry mousse cake is a refreshing dessert that is perfect for spring and summer. The cake is made with a lemon sponge cake, layered with a creamy raspberry mousse, and topped with fresh raspberries. The raspberry mousse is made with fresh raspberries, lemon juice, whipped cream, and gelatin, giving it a tangy and refreshing flavor. The cake is then chilled until set, making it a perfect dessert for hot summer days.