Directions

1. Preheat the oven to 450 degrees F. Melt the butter in a skillet over medium-high heat. Add the corn and 1/2 teaspoon salt and cook until tender, 5 to 6 minutes. Add the scallions and cook until soft, about 1 minute.
2. Spread the chili in an 8-inch-square baking dish. Top with half of the cheese followed by half of the corn mixture. Lay the polenta rounds on top, then sprinkle with the remaining corn and cheese.
3. Bake until the casserole is heated through and the top is golden, about 20 minutes. Let stand 5 to 10 minutes before serving.