To make the peanut sauce:
In a small sauce pan, simmer lemon grass in the water for 5 minutes, strain out the lemongrass and add the remaining ingredients to the water. Whisk well and simmer an additional 5 minutes. If the sauce doesn’t thicken, whisk for one minute over medium heat.
Boil a pot of water and add a little bit of salt. Add the pasta and cook until done. Drain and set aside.
Steam or blanch the vegetables. I steamed mine. In a large bowl, add the pasta and vegetables. Toss. Stir in some peanut sauce. I didn't measure anything because I was making the dish for one. If you are making it for several people, make a box of pasta and lots of veggies. Slowly stir in the sauce and taste. You probably won't need all of it. When I made it for myself, I probably only used 2-3 Tablespoons of the sauce. It is pretty flavorful. Just add a little as you go and save the leftover sauce in the refrigerator.
I sprinkled the pasta and veggies with sesame seeds before serving. This dish is good hot or cold. You can use whatever veggies you like too. Enjoy!