Begin by preparing your ingredients. Chop the onion, carrots, celery, and mince the garlic. Cut the chicken breast into bite-sized pieces and set aside.
In a large pot or Dutch oven, heat the vegetable oil over medium heat. Once hot, add the chopped onion and sauté for 3-4 minutes, until it becomes translucent and fragrant.
Add the sliced carrots and chopped celery to the pot. Continue to sauté the vegetables for another 5-6 minutes, stirring occasionally, until they begin to soften.
Stir in the minced garlic and cook for about 30 seconds, just until the garlic is fragrant but not browned.
Next, add the chicken breast pieces to the pot. Sauté for about 5 minutes, stirring occasionally, until the chicken is no longer pink on the outside.
Pour in the chicken broth, ensuring all the ingredients are submerged. Increase the heat until the broth comes to a gentle boil.
Once boiling, reduce the heat to low and let the soup simmer for about 20 minutes.
After 20 minutes, add the egg noodles to the pot. Stir gently and let the soup simmer for an additional 10-12 minutes, or until the noodles are cooked to your desired tenderness.
During the last few minutes of cooking, taste the soup and season with salt and pepper as desired.
Once the noodles are cooked, remove the pot from the heat. Stir in the freshly chopped parsley for a burst of freshness.
Serve the soup hot, ladling it into bowls. Enjoy with crusty bread or a simple side salad.
Notes
Leftover soup can be stored in an airtight container in the refrigerator for up to three days or frozen for longer storage.