In a mixing bowl or jar, combine peanut butter, water, soy sauce, honey, vinegar, ginger, garlic powder, red pepper flakes, and chili sauce. Stir or shake until completely combined and set aside.
In a large pot, bring water to a boil and cook pasta according to the package. Strain and set aside.
Meanwhile, in a large skillet or wok, heat oil over medium-high heat. Add veggies and sauté, stirring frequently, until cooked through, about 5-7 minutes. Set veggies aside in a bowl.
Add sauce and pasta to the pan and toss until warmed through. Add veggies back to pan and stir to combine. Serve with chopped peanuts and hot sauce. Enjoy!