Ingredients
Method
- Heat the olive oil in a large pot over medium heat.
- Add the thinly sliced onions, seasoning lightly with salt.
- Cook the onions for about 20–25 minutes until golden brown.
- Stir in the thyme and balsamic vinegar.
- Pour in the beef broth and bring to a simmer.
- Add the pasta and cook according to package instructions until al dente.
- Stir in the grated cheese until melted and creamy.
- Taste and adjust seasoning before serving.
