Jongno japchae sauce is a sweet and savory sauce, primarily made from concentrated soy sauce, fructose-glucose syrup, sugar, and garlic, with a distinct sesame oil and roasted sesame seed flavor. It also includes other ingredients like modified corn starch, caramelized sugar syrup, hydrolyzed wheat gluten, and various spices and enhancers, giving it a balanced taste and thick, glossy texture. For japchae: The sauce is specifically designed to season japchae, a popular Korean dish of stir-fried sweet potato starch noodles and vegetables. It can be used to marinate ingredients before stir-frying or to toss the cooked noodles and vegetables at the end for a glossy finish. Versatile seasoning: The sauce's versatile flavor profile makes it suitable for other Korean stir-fries and dishes as well.