In a large bowl, soak noodles in boiling water for approximately 5 to 8 minutes until softened but still firm; drain well. If not using immediately, rinse with cold water to separate; drain. In a small bowl, combine ketchup with fish sauce, lime juice, vinegar, brown sugar and chili paste. Reserve. In a large non stick skillet or wok, heat oil. Add garlic and onions; stir fry on medium heat until lightly browned and tender. Add reserved sauce and bring to a boil. Add eggs; when they start to set, stir mixture together. Add noodles and heat thoroughly. Add bean sprouts. Transfer noodles to a serving platter and sprinkle with peanuts, green onions and cilantro.