Cook spaghetti in a large pot of salted boiling water. Whisk together peanut butter, soy sauce, sesame oil, chili garlic paste, ginger, garlic, and sugar. Thin with the water. When noodles are done, drain and rinse under cold water. Toss sauce with pasta, and thin with more water if needed. Serve topped with a salad of shredded bok choy and carrots dressed with soy sauce, rice vinegar, and a little toasted sesame oil. Season with salt.
I made this recipe today for lunch. It was super easy, I used thin whole wheat spaghetti. I also used Chili Oil and Hot Chili Sesame Oil (for the salad garnish - I used carrots and spinach for that). I think I could have thinned out the sauce a little less so there would be more of a peanut butter taste. Otherwise this was a great light dish/lunch :)