Polenta Squares with Spicy Sausage and Spinach

This filling is on the hot side, so start with just ¼ teaspoon of the hot red pepper flakes if you prefer less heat. These polenta squares can be filled with any number of mixtures, perhaps even the kale and ricotta filling from the pasta shells. Just be sure that your filling is cohesive enough to hold its shape in the shallow indentation of the polenta.