Cook ground beef in a Dutch oven over medium-high heat about 3 minutes, stirring until meat crumbles. Add onion and next 4 ingredients, and sauté 4 minutes or until beef is no longer pink. Drain well. Return beef mixture to Dutch oven.
Stir in chicken broth and potatoes. Bring to a boil; cover, reduce heat, and simmer 10 to 12 minutes or until potatoes are tender.
Melt 3 tablespoons butter in a nonstick skillet over medium heat. Gradually stir in flour, and cook, stirring constantly, 2 to 3 minutes or until flour is lightly browned. Whisk flour mixture into simmering beef mixture; bring to a boil. Reduce heat, and simmer 6 minutes or until thickened.
Whisk in cheese and next 3 ingredients just until cheese melts. Serve with Easy Breadsticks, if desired.