Heat olive oil in a large pot over medium heat.
Add chopped onion and sauté until translucent, about 5 minutes.
Stir in minced garlic and cook for another minute.
Add crushed tomatoes and vegetable broth to the pot.
Season with dried basil, oregano, salt, and pepper.
Bring the mixture to a boil, then reduce heat to a simmer.
Let it simmer for 10 minutes to blend flavors.
Add the tortellini to the pot and cook according to package instructions.
Taste and adjust seasoning if needed.
Serve hot, garnished with fresh basil and Parmesan cheese.