Prepare Chili Oil: In a small pan over medium heat, pour in about ¼ cup of olive oil. Add minced garlic and chili flakes, cooking until golden and fragrant. Remove from heat to infuse.

Caramelize Onions: In a large skillet, heat another tablespoon of olive oil. Add sliced onions and salt, cooking for 20-25 minutes until caramelized.

Cook Pasta: Boil salted water, add pasta, and cook according to package instructions. Reserve a cup of pasta water before draining.

Combine Ingredients: Add cooked garlic to caramelized onions, cook for another minute. Then add drained pasta, tossing to combine.

Adjust Consistency: Gradually add reserved pasta water to achieve a creamy consistency. Drizzle with chili oil and mix well.

Serve: Plate the pasta, adjust seasoning, and garnish with Parmesan cheese and herbs. Serve immediately.