1. Make the polenta biscuits: Preheat the oven to 350°. In a large mixing bowl, whisk together the flour, cornmeal, baking powder, sugar, salt and baking soda. In a small bowl, whisk the buttermilk with the melted butter, then pour over the dry ingredients. Mix with a rubber spatula until the dough comes together in a ball.

2. Using a measuring cup, form six ½-cup clumps of dough, dropping each onto a baking sheet lined with parchment paper or a silicone mat. Bake for 25 minutes or until lightly golden on the bottom.