Spaghetti with Pecans and Radicchio

Name: Spaghetti with Pecans and Radicchio
Ingredients: Kosher salt; 8 ounces dried spaghetti; 4 ounces pancetta, diced; 3 cloves garlic, chopped; 1/2 cup chopped pecans; 1/2 teaspoon crushed red pepper flakes; 1/2 cup chicken broth; 1/4 cup white wine; 1 tablespoon unsalted butter; 1/2 cup grated Parmesan; 1 small head radicchio, chopped; 2 tablespoons chopped parsley