Bring a large pot of **heavily salted water** to a boil and cook the spaghetti until just shy of **al dente**.
While the pasta cooks, add the **olive oil** and **sliced garlic** to a cold, wide skillet.
Turn the heat to **medium-low** and cook the garlic slowly until it turns a light **golden blonde** color.
Add the **red chili flakes** to the oil and toast for about 30 seconds until fragrant but not burnt.⏱ 30 sec
Carefully ladle 1/2 cup of the **starchy pasta water** into the skillet to emulsify the oil into a sauce.
Transfer the **al dente pasta** directly into the skillet using tongs.
Toss the pasta vigorously over heat for 1 minute until the sauce coats every strand **glossy and smooth**.⏱ 1 min
Remove from heat, stir in the **fresh parsley**, and serve immediately in warmed bowls.