Dinner Tonight: Pepper and Sausage Ragu with Polenta Recipe

Name: Dinner Tonight: Pepper and Sausage Ragu with Polenta Recipe
Ingredients: 4 cups water; 1/4 teaspoon salt; 1 1/2 cups cornmeal; 1/3 cup grated Parmesan cheese (optional); 2 tablespoons unsalted butter (optional); 3 pounds pork Italian sausage, preferably in sheep casings; 7 tablespoons extra-virgin olive oil; 1 medium red onion, thinly sliced; 5 red and 5 yellow bell peppers, seeded, cored and cut into 1/2-inch strips; 1 tablespoons red chili flakes; 2 tablespoons dried oregano; 1 can tomato paste; 1 cup dry red wine