The literal translation of japchae, mixed vegetables, is quite misleading because the main ingredient of this dish is the korean sweet potato starch noodles, also known as glass noodles. This dish is a must-have for the korean festive holidays (like new years day or the harvest festival), probably because of its celebratory colours derived from the strips of carrots, bell peppers, spinach, cucumbers and mushrooms. The secret to success? Finding the right balance between soy sauce and sugar