Heat the olive oil and butter in your pot over medium-high heat. Once the butter melts, add the onion, carrots, and celery. Cook for about 5 to 7 minutes, stirring occasionally, until everything softens slightly and the onion turns translucent.
Stir in the minced garlic and cook for just 30 seconds to a minute. I always add garlic after the other vegetables because it burns fast and turns bitter if it hits the pan too early.
Add the turkey or chicken stock, bay leaf, and thyme to the pot. Bring everything to a gentle simmer, stirring occasionally so nothing sticks to the bottom of the pot.
Add the egg noodles directly into the simmering broth. Let them cook for about 8 to 10 minutes, or according to the package instructions, until they're tender but not mushy.
Add your shredded or chopped turkey into the pot. Let it warm through for about 3 to 5 minutes on low heat so it doesn't dry out or toughen.
Remove the bay leaf, then season the soup with salt and pepper to taste. Stir in the fresh parsley right before ladling it into bowls so it stays bright and fresh.