Place the Cold Buckwheat Noodles, Tsuyu Sauce, and Toppings at the Table - Once you have finished cooking the noodles, and the noodles have had time to chill, place them on a small plate or basket and set it at the table. Place the toppings/garnishes and tsuyu dipping sauce at the table as well.
Prepare the Small Dipping Sauce Bowls - Using a small bowl, put in a few of your favorite garnishes (wasabi, toasted sesame seeds, grated daikon radish, green onions, grated ginger). Pour the tsuyu dipping sauce into the bowls.
Dip the Noodles in the Sauce and Slurp Up the Noodles! - Take a small amount of noodles and dip it in the sauce you just created! Then slurp up the noodles and enjoy!
Make a Soup with the Remaining Dipping Sauce - When the meal is done, you will most likely have a lot of dipping sauce left. Traditionally, zaru soba would use the leftover soba noodle water (sobayu) to water down the dipping sauce to make it into a soup! Instead of the soba water, I re-steeped the tea in a teapot and used that to water down the dipping sauce to make the soup instead.