Heat the olive oil in a large pot over medium heat. Add the Italian sausage and cook, breaking it up with a spoon, until browned and cooked through, about 5 minutes.
Add the onion and garlic and cook until softened, about 5 minutes.
Add the chicken broth, tomatoes, oregano, basil, and red pepper flakes and bring to a boil. Reduce heat and simmer for 15 minutes.
Add the tortellini and cook until tender, about 8 minutes.
Stir in the Parmesan cheese and serve.
Interesting Facts
Tortellini is an Italian filled pasta, shaped like a ring or a hat.
The origin of the tortellini’s shape is still unknown, but there are many legends about it.
The word “tortellini” comes from the Italian word “tortellino”, which means “little cake”.