01 - In a large pot of boiling water, cook spaghetti and frozen edamame together according to package directions until pasta is al dente. Drain thoroughly.
02 - In a mixing bowl, whisk together smooth peanut butter, soy sauce, honey, rice vinegar, and warm water until creamy and emulsified.
03 - Return drained pasta and edamame to the pot or a large serving bowl. Pour peanut sauce over the mixture and toss well to evenly coat.
04 - Serve noodles warm or at room temperature, garnished with sliced green onions as desired.