Meanwhile, in a medium saucepan, combine chicken broth, soy sauce, peanut butter, sesame oil, and hot sauce. Whisk until blended and set pan over medium heat. Bring to a simmer. Simmer 10 minutes.
Heat peanut oil in a large skillet over medium heat. Add ginger and garlic and saute 2 minutes. Add bell pepper and saute 2 minutes. Add shrimp and saute 2 minutes. Add 1 cup of the peanut sauce sauce and simmer 2 minutes, until shrimp are bright pink and cooked through. Drain noodles and add to shrimp mixture. Toss to combine.
Transfer noodle mixture to 4 individual plates and top each serving with peanuts, scallions and cilantro, if desired.
Reserve remaining peanut sauce for additional meals such as Robin's Steak Salad with Peanut-lime Dressing, or Chicken Satay with Peanut Dipping Sauce.