Directions

1. Heat broiler, with rack set 4 inches from heat; line a rimmed baking sheet with aluminum foil. Soak four 12-inch (or eight 6-inch) wooden skewers in a pan of warm water; set aside. Bring a large pot of salted water to a boil.
2. Meanwhile, make sauce: In a small bowl, whisk together honey, brown sugar, soy sauce, 2 tablespoons vinegar, curry paste, and 1 tablespoon oil. Reserve half the sauce for serving.
3. Thread beef, onion, and pineapple onto skewers. Place on prepared baking sheet, and brush with sauce. Broil, brushing occasionally with sauce, until beef is medium-rare and onion begins to char, 7 to 10 minutes.
4. Meanwhile, cook noodles in boiling salted water, according to package instructions. Drain, and place in a medium bowl. Add cilantro and remaining vinegar and oil; season with salt, and toss to combine. Serve skewers with noodles, reserved sauce, and, if desired, red-pepper flakes.