Bring a large pot of water to a boil; cook the noodles as per the directions on the package.
Before draining the noodles, reserve about 1/2 cup of the pasta water. This can be used to thin out your sauce if necessary.
While the pasta is cooking, heat the sesame oil and butter in a large skillet over medium heat. When the butter is melted, stir in the garlic slices. The butter will likely foam—that's normal. Cook the garlic for about 5 minutes, stirring often to prevent burning, or until lightly browned/caramelized.
Add the oyster sauce, fish sauce, soy sauce, and honey. Simmer for about 30 seconds; stir in the sliced scallions.
Add the drained pasta to the skillet along with the parmesan cheese. Using tongs, toss the noodles well to coat them evenly and to melt the cheese. If the sauce seems too thick, add 2-3 tablespoons of the reserved pasta water to the skillet; continue to toss.
Garnish the noodles with sesame seeds and chili flakes, if you want to add a little kick. Serve right away!