Step 1

In a large pot, heat olive oil over medium-high heat. Add the onion and cook until starting to soften, about 2-3 minutes. Add the garlic and cook, stirring constantly, for 1 more minute.

Step 2

Stir in the diced tomatoes, tomato sauce, Italian seasoning, beef broth, and meatballs. Bring to a boil; reduce heat to low and simmer (uncovered) for 20 minutes.

Step 3

Add tortellini and cook just until tender, about 5-7 more minutes.

Step 4

Stir in Parmesan cheese. Taste and season with salt and pepper, if necessary.

Step 5

Serve soup immediately, and garnish with additional cheese and fresh herbs.