To create your amazing Caramelized Onion Pasta with Chilli Oil, just follow these simple steps:

1. Cook the Pasta: Bring a large pot of salted water to a boil. Add the spaghetti and cook according to package instructions until al dente. Drain and set aside.
2. Heat Oil: In a large skillet, heat 4 tablespoons of olive oil over medium heat.
3. Add Onions: Add the sliced onions to the skillet. Cook, stirring occasionally, for about 10-12 minutes until they turn golden and caramelized.
4. Add Garlic: Stir in the minced garlic and cook for an additional 1-2 minutes until fragrant.
5. Season: Pour in the chilli oil and season with salt and black pepper. Stir well to combine all the flavors.
6. Combine Pasta: Add the drained spaghetti to the skillet and toss to combine with the caramelized onion mixture.
7. Taste and Adjust: Taste the pasta and adjust the seasoning if necessary, adding more chilli oil if desired.
8. Garnish: Remove from heat and serve, garnishing with chopped parsley and grated Parmesan cheese if using.

By following these steps, you’ll have an incredible dish ready to savor in no time!