You need 1 ingredient. The key ingredients include: ["For the Polenta", "1 tablespoon butter or olive oil", "1 cup coarse polenta or cornmeal, preferably Bob's Red Mill", "1 cup cold water", "4 cups chicken stock, heated, or boiling water", "1 ear fresh corn, kernels removed, or 1 cup frozen corn kernels", "1/2-1 cups fresh grated Parmesan cheese", "1/4 cup butter or olive oil", "1/4-1/2 cups additional chicken stock, water, milk, cream, or half-and-half", "Kosher salt and fresh-ground coarse black pepper", "For the Ragout", "4-6 tablespoons olive oil", "1 pound Italian sausage links, sweet ot hot, cut into 1"" chunks", "2-4 cloves garlic, pressed", "1 large yellow onion, chopped", "1 yellow bell pepper, roasted, peeled and sliced into 1/2"" strips", "1 small eggplant, peeled and diced, sprinkled with salt and placed in a large strainer to drain", "1 medium zucchini, peeled and/or seeded if desired, quartered lengthwise and cut into 1"" chunks", "1/2 pound white button or cremini or portobello mushrooms, sliced", "6 Roma tomatoes, peeled, seeded and quartered", "2 teaspoons sugar", "1 teaspoon chopped fresh oregano or 1/2 tsp. dried", "1 tablespoon chopped fresh basil or 1 tsp. dried", "1 teaspoon fresh thyme, or 1/2 tsp. dried", "Kosher salt and fresh-ground coarse black pepper", "Shaved Parmesan, for garnish", "1 tablespoon chopped fresh parsley, for garnish"].