This soup is reminiscent of the simple, comforting meals that Frankie and her fellow nurses might have shared during brief respites in the chaotic Vietnam War setting.
Heat olive oil in a large pot over medium heat.
Add onion, carrots, and celery; sauté until softened.
Stir in garlic and cook for another minute.
Pour in chicken broth and tomatoes; bring to a boil.
Add chicken and pasta; reduce heat and simmer until pasta is cooked.
Season with salt and pepper; garnish with parsley before serving.