In a large stock pot, heat the olive oil over med-high heat. Add the onions and cook until softened. Add the carrots and celery and continue to cook until soft. Stir in the garlic and cook for an additional minute.
Add the cooked chicken to the pot and stir to combine. Add the chicken stock, herbs, salt and pepper and allow the mixture to come to a boil. Turn down the heat to low and add the noodles Simmer for 10 minutes or until the noodles are al dente.
Season with salt and pepper to taste.
Serve immediately or transfer to airtight containers and freeze for up to 3 months.