For the Meatballs:

• 1 pound (450g) ground beef (or a mix of beef and pork)
• 1/4 cup breadcrumbs
• 1/4 cup grated Parmesan cheese
• 1 egg
• 2 cloves garlic, minced
• 1 teaspoon Italian seasoning
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1 tablespoon fresh parsley, chopped (optional)

For the Soup:

• 1 tablespoon olive oil
• 1 small onion, diced
• 2 cloves garlic, minced
• 2 celery stalks, chopped
• 1 can (14.5 oz) diced tomatoes
• 4 cups (1 liter) chicken or beef broth
• 1 teaspoon Italian seasoning
• 1/2 teaspoon salt (adjust to taste)
• 1/4 teaspoon black pepper
• 1 cup small pasta (such as ditalini or elbow macaroni)
• 1/2 cup heavy cream
• 1/2 cup grated Parmesan cheese
• 1 cup fresh spinach or basil, chopped
• Extra Parmesan cheese, Fresh basil or parsley, Crushed red pepper flakes