Cook the noodles in salted boiling water until al dente, then drain and rinse to cool
Mix hoisin, soy sauce, sesame oil, and maple syrup in a small bowl
Heat oil in a large skillet, add the garlic and white scallion parts, and cook until fragrant
Quickly pour in the sauce and add the noodles, tossing to coat
Let the noodles cook undisturbed until the bottom turns crispy, 2 to 3 minutes
Season to taste
Serve topped with sesame seeds and the green scallion parts
