Heat neutral oil, pour over garlic, scallions, chili powder, and sesame seeds
Add water (1-2x amount of water to sesame paste, past thickness depends by brand) to 3 tbsp thick sesame paste, mix vigorously until velvety smooth
Add watery sesame paste and other condiments (see ingredients list) to sauce
Boil noodles, put in cold water (ice bath preferred)
Boil beef rolls
Prep garnish (optional) of cucumber and bean sprouts
Pour sauce over noodles, beef, and garnish, enjoy!