Fusilli With Peppers and Pancetta

Name: Fusilli With Peppers and Pancetta
Ingredients: ½ medium yellow onion; ½ red bell pepper; ½ green bell pepper; ½ yellow bell pepper; 3 Tbsp. butter; ¼-inch-thick slice pancetta (about 2 ounces); Salt; Freshly ground black pepper; 1 pound fusilli; ½ cup heavy cream; ⅓ cup freshly grated Parmigiano-Reggiano