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