Sauté the Aromatics
In a large pot or Dutch oven, heat the olive oil over medium heat.
Add the chopped onion, carrots, and celery. Sauté for about 5–7 minutes until the vegetables start to soften.
Stir in the minced garlic and cook for an additional 1 minute, being careful not to let it brown.
Add the Broth and Chicken
Pour in the chicken broth and bring the mixture to a gentle boil.
Add the chicken pieces, thyme, and bay leaf (if using).
Reduce the heat to a simmer, cover the pot, and let the soup cook for about 10–12 minutes or until the chicken is cooked through.
Cook the Noodles
Stir in the egg noodles.
Continue simmering, covered, for about 6–8 minutes, or according to the noodle package instructions, until the noodles are tender.
Season and Serve
Remove the bay leaf.
Taste the soup and adjust seasoning with salt and pepper as needed.
Ladle into bowls and top with fresh parsley or cilantro for a pop of color. Serve hot.