Creating One Pot French Onion Pasta is straightforward and can be done in just a few simple steps:

1. Heat Olive Oil: In a large pot over medium heat, add the olive oil and let it warm up.
2. Cook Onions: Add the thinly sliced onions to the pot. Cook for about 10 minutes, stirring occasionally, until the onions are caramelized and golden brown.
3. Add Garlic: Stir in the minced garlic and cook for an additional 1-2 minutes until fragrant.
4. Combine Ingredients: Pour in the vegetable broth, dried thyme, salt, and pepper. Bring the mixture to a boil.
5. Add Pasta: Once boiling, add the pasta. Stir well, then reduce heat to a simmer and cover the pot. Cook for about 10-12 minutes or until the pasta is al dente.
6. Incorporate Cheeses: Remove the pot from heat and stir in the grated Gruyère and Parmesan cheese until melted and combined.
7. Garnish: Serve warm, garnished with fresh parsley if desired.

These simple steps will guide you in creating an incredible pasta dish that is sure to impress everyone at your table!