In a large bowl, mix together the sesame paste, soy sauce, rice vinegar, sesame oil, sugar, and garlic.
Cook the noodles according to the package instructions. Save ¼ cup of the cooking water, then drain well.
Toss the noodles with the sauce, loosening with hot noodle water if too thick.
Enjoy topped with toasted sesame seeds and chili flakes if desired.
