Take the beef out of the refrigerator and leave it out for about an hour to let it come to room temperature. Wash the surface of the beef. Chop the onion roughly.
Put the beef, water and salt into a pan and bring to a boil. Skim off the scum, and add black peppercorns, bay leaves and chopped onion.
Turn the heat down to low, cover with a lid and simmer for 2 to 3 hours. Skim off the scum occasionally. In the meantime, cut the vegetables into easy-to-eat pieces.
When the meat is done, take it out of the pan and put in the carrot, celery and daikon radish. Simmer for about 10 minutes over medium heat, then add the potatoes.
Cut the simmered beef block into bite-sized pieces and add to the pan. Keep simmering while skimming any scum off, until the vegetables are tender.
Taste and add salt and pepper if needed. Garnish with parsley and it's done. Remove the bay leaves and whole peppercorns before serving.
Story Behind this Recipe
This is a home cooked recipe that's made a lot in Finland. Liha means "meat," and keitto means "soup." Since beef is used almost every time, I made the title "Beef soup". Please try this Finnish home-cooked recipe .
I recommend using a heavy pan, such as an enameled cast iron pan. In Finland, root vegetables such as rutabaga and parsnips are added too, but since they're difficult to get in Japan, I added daikon radish instead. Green peas are often added too.