This unique cake is a twist on the classic pineapple upside-down cake. The combination of sweet strawberries and tart rhubarb makes for a delicious and refreshing dessert. To make this cake, you will need flour, sugar, baking powder, salt, butter, eggs, vanilla extract, milk, fresh strawberries, and rhubarb. Mix the dry ingredients and then add the wet ingredients to make the batter. Arrange the sliced strawberries and rhubarb on the bottom of a greased baking dish and pour the batter on top. Bake for 45-50 minutes until golden brown. Let it cool for a few minutes before flipping it over onto a serving plate. Serve warm with a dollop of whipped cream or vanilla ice cream.