Fresh Plums With Polenta Cake
Heat oven to 350° F. Butter a 9-inch square baking dish. Slice the plums into a bowl. Sprinkle with ¼ cup of the sugar and toss; set aside.
In a small saucepan, over low heat, warm the milk and vanilla. Add the butter, zest, and salt. Bring to a simmer. Whisking constantly, slowly stir in the polenta. Cook, still whisking, for 1 minute. Transfer to a large bowl. Add the honey, egg yolks, and 3 tablespoons of the remaining sugar and whisk until combined. Let cool until lukewarm.
In a large bowl, with an electric mixer on medium, beat the egg whites and the remaining sugar until soft peaks form. With a spatula, fold the egg white mixture into the polenta mixture.