Cook soba noodles according to directions on package. Once cooked, place in a bowl of ice water to cool completely. You want them cold.
Place dressing ingredients in a jar with a lid. Place lid on jar and shake until well combined. Alternately, you can just whisk the ingredients together in a small bowl but I like to shake them in a jar.
Place cold noodles in a large bowl and combine with zucchini, summer squash, cabbage, carrot, and green onion.
Toss with dressing.
Top with sesame seeds.
Serve and enjoy!