Creating the perfect meatball soup is easy when you follow these simple steps:

1. Prepare the Meatballs: In a large bowl, combine ground beef, breadcrumbs, Parmesan cheese, parsley, onion, egg, salt, and pepper. Mix until well combined.
2. Shape the Meatballs: Form the mixture into small meatballs, about 1 inch in diameter. Set aside.
3. Sauté the Vegetables: In a large pot, heat olive oil over medium heat. Add diced carrots, diced celery, and minced garlic. Sauté for 5-7 minutes until vegetables are soft.
4. Add the Broth: Pour in the beef broth and water. Bring the mixture to a boil.
5. Add the Meatballs: Once boiling, carefully drop the meatballs into the hot broth. Reduce heat to a simmer and cover the pot.
6. Incorporate Tomatoes and Seasoning: Add diced tomatoes and Italian seasoning to the pot. Stir gently to combine.
7. Cook the Soup: Allow the soup to simmer for 30-35 minutes. This will cook the meatballs and allow the flavors to meld beautifully.
8. Taste and Adjust: After simmering, taste the soup and adjust seasoning with salt and pepper as needed.
9. Serve Hot: Once everything is cooked through and flavorful, the meatball soup is ready to be served.

These steps will lead you to a delightfully comforting bowl of meatball soup that everyone will love.