Cook the soba noodles according to the package instructions until just al dente. If the noodles become sticky after draining, rinse them briefly under cold water to loosen and separate.
While the noodles are cooking, prepare the sesame sauce. In a small bowl or jar, whisk together the tahini, warm water, soy sauce, sesame oil, rice vinegar, garlic, and sriracha until smooth and creamy. Adjust sriracha to your desired spice level.
Once the noodles are ready and drained, toss them in about half of the prepared sesame sauce to coat thoroughly. This ensures they absorb the flavor before assembling the bowls.
Divide the dressed noodles into serving containers or bowls. Top with the thawed edamame, diced cucumber, and roasted chicken slices. Drizzle with additional sesame sauce to taste and finish with a sprinkle of sesame seeds for a nutty crunch.
These bowls can be enjoyed warm or chilled. Store in the refrigerator for up to four days for quick, flavorful meals throughout the week.