Tteokguk is a traditional Korean soup dish that is eaten during the celebration of the Korean New Year. It is tradition to eat this soup on New Year's day because it’s believed to gain an additional year of life as well as bring in luck in the forthcoming year. The dish consists of thinly sliced rice cakes in a broth/soup and it’s usually garnished with thin julienned cooked eggs, some marinated meat (usually beef), and dried, crushed lavers.
The broth is generally made by simmering the main protein (beef, chicken, pork, seafood) in a soy sauce-based seasoned stock. The stock is then strained to clarify the broth and long cylinder-shaped rice cakes (garaetteok) are thinly sliced diagonally and boiled in the broth. Garnish is added before serving and it may vary by region and personal taste.
Varieties of tteokguk exists but a popular one is tuk mandooguk which is made by simply adding Korean dumplings.