In a large bowl, combine the ground beef, egg, bread crumbs, Parmesan cheese, 1 tablespoon parsley, 1 teaspoon Italian seasoning, garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon pepper. Mix together until well combined.
Form into 1-inch meatballs and set aside.
Heat the olive oil in a large pot over medium heat. Add the onion and garlic and cook until the onion is translucent, about 5 minutes.
Stir in the diced tomatoes, beef stock, frozen vegetables, 2 tablespoons parsley, 1 teaspoon Italian seasoning, and salt and pepper to taste. Bring to a boil.
Add the meatballs and reduce heat to low. Simmer until the meatballs are cooked through, about 10 minutes.
Serve hot.
Interesting Facts
This soup originated in Italy and is a classic comfort food.
The type of vegetables used in the soup can vary depending on what is in season.
This soup is usually served with a side of crusty bread.