Melt the butter in a large pot or dutch oven (4-quart or larger) over medium heat. Add the onion, carrots, celery, and garlic. Cook, stirring occasionally, for 5 minutes or until vegetables have softened. Stir in flour, salt, pepper, thyme, and oregano and cook for 2 minutes.

Next, add the chicken broth and potato. Give everything a quick stir, then increase the heat to medium-high. Bring the soup to a boil, without stirring, and boil for 3 minutes. Reduce the heat to medium-low, partially cover the pot, and allow to simmer for 25 minutes or until the potatoes have softened.

Add the chicken, half-and-half/milk, and noodles. Cook for 10 minutes until the noodles are tender and the soup has thickened. Once again, taste the soup and add more seasoning as desired. Serve warm.

Cover and store leftovers in the refrigerator for up to 1 week. To reheat, pour into a pot over medium heat and cook until warm. Add more chicken broth if it’s too thick.