In a medium bowl, whisk together the peanut butter, soy sauce, rice vinegar, sesame oil, Sriracha, water, ginger, garlic, brown sugar, and water.
Bring a large pot of salted water to a boil. Cook the pasta according to the package instructions. Drain and run under cold water to cool.
Combine pasta with the sliced vegetables in a large bowl.
Pour the dressing over the pasta and vegetables and mix well. Cover and chill for at least 1 hour, or overnight. To serve, garnish with chopped cilantro and peanuts.
This makes a LOT of pasta salad. If you are not feeding an army cut the recipe in half.