Creating French Onion Soup Pasta is simple if you follow these step-by-step instructions:

1. Cook the Pasta: In a large pot, bring salted water to a boil. Add the pasta and cook according to package instructions until al dente. Drain and set aside.
2. Caramelize the Onions: In a large skillet, melt the butter and olive oil over medium heat. Add the sliced onions and sugar. Cook, stirring occasionally, for about 20-25 minutes until the onions are deep golden brown and caramelized.
3. Add Broth and Seasoning: Pour in the beef or vegetable broth and add dried thyme. Bring the mixture to a simmer and let it cook for an additional 5-10 minutes. Season with salt and pepper to taste. If desired, add balsamic vinegar for an extra depth of flavor.
4. Combine Pasta and Sauce: Add the cooked pasta to the skillet with the onion mixture. Toss everything together until the pasta is well coated with the sauce.
5. Cheese It Up: Sprinkle half of the Gruyère cheese over the pasta and stir until melted. Reserve the other half for topping.
6. Transfer to Baking Dish: Preheat your oven to broil. Transfer the pasta mixture to a greased baking dish. Top with the remaining Gruyère cheese.
7. Broil: Place the baking dish under the broiler for about 3-5 minutes, or until the cheese is bubbly and golden brown.
8. Garnish and Serve: Remove from the oven and let it cool slightly. Garnish with fresh parsley before serving.

These steps will ensure you create a delicious and comforting bowl of French Onion Soup Pasta that your family and friends will rave about!