In a small bowl, mix vinegar, sugar and salt until blended. Stir in carrots and onion; let stand at room temperature 30 minutes., In a large skillet, cook pork, ginger and garlic over medium heat 6-8 minutes or until pork is no longer pink, breaking up pork into crumbles; drain. Stir in soy sauce, mirin, salt, pepper and, if desired, fish sauce., To serve, drain carrot mixture. Place pork mixture in lettuce leaves; top with cucumber, red pepper, green onions, carrot mixture and herbs. Sprinkle with jalapeno and peanuts; drizzle with hoisin sauce. Squeeze lime juice over tops. Fold lettuce over filling.