Meanwhile, cook sausage in a Dutch oven over medium heat, stirring often, 8 to 10 minutes or until meat crumbles and is no longer pink.
Add onion, and saut 5 minutes.
Add garlic, and saut 1 minute. Stir in vinegar, and cook 3 minutes.
Add chicken broth; cook 5 minutes. Stir in spinach and next 3 ingredients; cook 2 minutes or until thoroughly heated. Stir in hot cooked pasta, and serve immediately.