Prepare rice noodles as label directs.
In cup, whisk fish sauce, sugar, and vinegar.
In 12-in. skillet, heat vegetable oil on med.-high. Add ground pork, garlic, jalapeño, and 2 tbsp. fish sauce dressing. Cook 5 minutes or until pork is cooked through, crumbling with back of wooden spoon.
Cut cooked noodles with kitchen shears. Add to large bowl with pork, romaine heart, and remaining dressing. Toss. Garnish with peanuts and herbs.
