Bring 2 cups water to a boil in medium saucepan. Add broken noodles. Remove from heat, and let stand 5 to 7 minutes, or until noodles are rehydrated. Drain, and discard water.Meanwhile, whisk together soy sauce, rice vinegar, sugar, chile sauce, and 1/4 cup water in small bowl. Set aside.Heat oil in skillet over medium-high heat. Add onion and garlic, and stir-fry 1 minute. Add bell pepper and broccoli, and cook 1 minute more. Add soy sauce mixture, bring to a boil, and cook 1 minute more, or until bell pepper and broccoli are tender. Stir in noodles. Serve sprinkled with roasted peanuts, if using.