This delicious cake is a twist on the classic pineapple upside-down cake. The sweet and tangy combination of strawberries and rhubarb is the perfect topping for a moist and fluffy vanilla cake. The cake is easy to make and is sure to impress your guests. Simply melt butter and brown sugar in a skillet, add sliced rhubarb and strawberries, and pour the cake batter on top. Bake until golden brown and flip the cake over to reveal the beautiful fruit topping.