Bring a large pot of salted water to a boil. Cook the noodles to al dente according to package instructions, then drain and return to the pot. Drizzle with a little olive oil to prevent sticking. Cover and set aside.

Meanwhile, in a Dutch over or similar large pot, heat the oil or butter over medium heat. Add the onion, carrots, celery, 1 teaspoon salt, and the pepper. Cook, stirring, until softened, 5 to 7 minutes.

Add the thyme sprigs, garlic, and ginger, and cook, stirring constantly, until fragrant, about 30 seconds to 1 minute.

Add the chicken and return to a high simmer (it should not fully boil). Reduce the heat to medium-low, partially cover the pot, and simmer for 10 to 12 minutes, until the chicken is cooked through (it should reach 165°F on an instant read thermometer). Transfer the chicken to a cutting board and dice or shred. Fish out and discard the thyme sprigs.

Return the chicken to the pot. Add the lemon juice. Taste and adjust seasoning as desired.

If you'll be serving all of the soup at once: Stir the noodles into the pot with the broth/chicken and ladle into serving bowls. If you know you want leftovers, divided the noodles between bowls, then ladle the broth/chicken mixture over the top (this allows you to store the noodles separately so they don't become mushy). Sprinkle with fresh parsley and serve.