Lunch-Box Chicken Soup

In a Dutch oven, heat oil over medium-high heat. Add vegetables; cook and stir until carrots are crisp-tender., In a bowl, whisk flour and broth until smooth; stir into pan. Bring to a boil, stirring constantly; cook and stir until thickened, 5-6 minutes. Add remaining ingredients; heat through, stirring occasionally (do not allow to boil).