Take out a large pot. Place-in all of the listed ingredients under "Broth Ingredients".
Place the pot on medium-high heat. Use a spatula and throughly mix-in all of the ingredients.
While the broth is still luke-warm, place in the beef pieces. (Boiling them in low-heat prevent them from fusing together). Once the pieces are fully cooked, take them out with chopsticks. Set aside for later.
As soon as the broth comes to a boil, turn off the heat.
Then place-in all of the mushrooms and fresh vegetables around the frying pan. Place the boiled beef in the center.
When you are ready to eat, turn the heat back on. When the broth start boiling, throw in the udon noodles (optional)
Bon Appetit and enjoy!