In a large pot or Dutch oven, melt a little butter or add a splash of oil. Add the diced onion, carrots, and celery. Cook for about 4–5 minutes until they start to soften.
Stir in the garlic, oregano, parsley, salt, and pepper. Pour in the chicken broth and give everything a good mix.
Add the chicken tenders (or breasts/thighs) right into the pot. Bring the soup to a gentle boil, then add the pasta.
Reduce the heat to medium and let everything simmer until the noodles are tender and the chicken is cooked through—usually about 12–15 minutes.
Remove the chicken from the pot, shred it, and set it aside for a minute.
In a small bowl, whisk together the heavy cream and cornstarch until smooth. Pour the mixture into the pot and stir until the broth starts to thicken and turn creamy.
Add the shredded chicken back into the pot, give it one more stir, and taste to adjust seasonings if needed.
Ladle the soup into bowls and enjoy it warm—it's total comfort in a bowl!