In a soup pot, heat olive oil over medium high heat.
Saute the onion and garlic, stirring often until onions are translucent, about 5 to 7 minutes.
Add broth and tomatoes, turn heat up to high, and bring to a boil.
Add the tortellini and cook according to package instructions.
When tortellini is almost done, add spinach and taste, adjusting seasonings with salt and pepper.
Garnish each serving with a sprinkling of Parmesan.