I suggest you read the directions on the soba noodle packet as to what they recommend for cooking time.. Take this into consideration when following the cooking directions below.

Heat 2L of water to a boil in a large pot over high heat.

Add the noodles a small bundle at a time, stirring gently to separate. When the water returns to a full boil, add 1 cup of cold water. Repeat this twice. When the water returns to a full boil, check the noodles for doneness. You want to cook them until they are firm-tender. Do not overcook them. I suggest you try the noodles after each addition of cold water to see if they are done.

Drain the noodles in a colander and rinse well under cold running water until the noodles are cool. This not only stops the cooking process, but also removes the starch from the noodles. This is an essential part of soba noodle making. Once the noodles are cool, drain them and cover them with a damp kitchen towel and set them aside allowing them to cool completely.

Top with sliced green onion and sesame seeds. Serve with mentsuyu dipping sauce.

Mentsuyu Dipping Sauce

Place mirin, soy and dashi in a saucepan.

Gently simmer for 5 minutes.

Set aside and cool, then refrigerate until ready to use.