Japchae (잡채) is one of Korea's most beloved celebration dishes.Whether it's Lunar New Year, Chuseok, birthdays, weddings, or family gatherings, a large plate of glossy glass noodles is almost always on the table.Although Japchae looks impressive, many home cooks struggle with noodles that become soggy, vegetables that release too much water, or seasoning that doesn't blend evenly.After making Ja..