Combine first 11 ingredients in a bowl, stirring with a whisk; set aside.
Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add pork and pepper; cook 6 minutes or until pork is done. Add peanut butter mixture to pan, stirring well to coat pork; bring to a boil. Reduce heat, and simmer 1 minute.
Cook rice noodles according to package directions, omitting salt and fat; drain. Add noodles to the pork mixture, tossing gently. Sprinkle with sliced green onions. Serve with lime wedges, if desired.