This is a fabulous recipe. I've been asked for it more times than I can count. This is my 'go to' dish to take to ill or grieving families. It's definitely comfort food. If you're in a hurry, it's easy enough to use frozen veggies in exchange for fresh.
In large saucepan, bring broth to boil. Reduce heat; add vegetables, salt and pepper. Cover and simmer for 15 minutes or until vegetables are tender.
Meanwhile, melt butter in medium saucepan; add flour and mix well with whisk. Gradually stir in milk; cook over low heat until slightly thickened, about 3 minutes. Stir in cheese until melted; add to broth along with chicken. If using soup base; add now (be sure to reduce amount of salt). Cook and stir over low heat until heated through, about 3 minutes.