In a large pot or Dutch oven, heat olive oil over medium-high heat until shimmering. Add onion, carrots, and celery and cook until softened, about 5 minutes.
Stir in broth, chicken, thyme, and bay leaf. Bring to simmer and cook until vegetables are tender, about 15 minutes.
Stir in noodles and cook until tender, about 5 minutes longer. Remove from heat, season to taste with salt and pepper, and garnish with fresh parsley.
Video
Notes
Chicken:Leftover chicken torn into bite-sized pieces works perfectly here, or you can poach a chicken (and make broth at the same time). Cooked turkey is delicious too.