This innovative recipe takes the classic upside-down cake to a whole new level by incorporating the delicious combination of strawberries and rhubarb. The cake batter is made with a blend of flour, sugar, eggs, and butter, and then topped with a layer of sliced strawberries and rhubarb that have been cooked in a mixture of brown sugar and butter. Once baked, the cake is flipped over to reveal a beautiful and delicious topping that is sure to impress your guests.