An upside-down cake is the perfect way to show-case the season's first strawberries and rhubarb. This recipe is a single-layer version of hot-milk cake, a standard for Southern home bakers. Serve it at room temperature with scoops of vanilla ice cream or dollops of whipped cream. If fresh rhubarb and strawberries aren't available, you can substitute frozen fruit. If the fruit is in large chunks, cut into 1/2"-inch pieces. Use the fruit straight from the freezer, without thawing. This came from Cooking Club of America. I have not tried this posting for safe keeping.