Creating One Pot French Onion Pasta is straightforward. Follow these simple steps:

1. Sauté Onions: In a large pot, heat olive oil and butter over medium heat. Add the sliced onions and sprinkle with sugar. Cook, stirring occasionally, until the onions are caramelized (about 10-12 minutes).

2. Add Broth: Pour in the vegetable broth and add salt, black pepper, and thyme to the pot. Stir to combine.

3. Cook Pasta: Add the pasta to the pot, ensuring it’s submerged in the broth. Bring the mixture to a boil, then reduce heat to a simmer. Cover and cook according to pasta package instructions, usually about 8-10 minutes.

4. Check Consistency: When the pasta is al dente, check the consistency. If there’s too much liquid, increase the heat slightly and cook uncovered for a few more minutes until it’s absorbed.

5. Add Cheese: Once the pasta is cooked, remove the pot from heat. Stir in the Gruyère and Parmesan cheese until melted and creamy.

6. Adjust Seasoning: Taste the pasta and adjust the seasoning if necessary, adding more salt or pepper as desired.

7. Serve: Dish the pasta into bowls, garnish with fresh parsley if using, and enjoy!