Tuscan Sausage Pasta

Name: Tuscan Sausage Pasta
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Cuisine: Italian
Ingredients: 12 ounces rigatoni pasta (or other short pasta); 1 teaspoon olive oil; 1 pound ground Italian sausage (see note); 2 tablespoons butter; 4 teaspoons minced garlic; 2 tablespoons flour; 1 ½ cups chicken broth; 1 cup heavy cream; ⅓ cup freshly grated parmesan cheese; 1-2 teaspoons salt (to taste); ½ teaspoon freshly cracked black pepper; ¼ teaspoon crushed red pepper flakes; 1 12-ounce jar roasted red bell peppers (chopped); 1 cup baby spinach leaves