Set pasta water to boil with salt & oil, then start measuring your ingredients. Once you've finished prepping them, your pasta water should be about ready, so add your raw noodles and set a timer, keeping an eye on them in the background.
Cook the garlic in the toasted sesame oil over medium-low heat for 2 minutes, until starting to brown, and then add the gochujang and cook for 1 more minute.
Next, turn the sauce's heat to low & slowly pour in the heavy cream, stirring as you go so they combine easily.
Once all the heavy cream is in, add your sour cream and mix well, raising the temperature to medium-low and cooking everything for 2 minutes to flavor the fat. Keep an eye on it, but this is a good time to grate the parmesan, if using.
Then stir in your chives, maple syrup, salt, and smoked paprika, and cook for 1 more minute.
Your noodles should be done by now, so strain your pasta, turn the heat off under the sauce, and then add the pasta and stir well, until the noodles are fully coated in the gochujang pasta sauce.