A favorite dinner in a soup! We added a few vegetables as well but the kids will still love this one dish meal.
In a large saucepan, bring broth to a boil over high heat. Add pasta. Return to a boil. Reduce heat and let simmer, uncovered, for 5 minutes. Add vegetables. Cook until pasta and vegetables are tender, about 5 minutes more.
Combine milk and flour in a resealable container; shake well to combine. Stir in to pasta mixture. Cook and stir until thickened and bubbly. Gradually add the cheese, stirring until cheese melts.