CUT meat crosswise into 1-inch wide strips; cut each strip in half. Toss meat and peppers with oil.
BREAK Noodles into 3 to 4 pieces; reserve Seasoning Packet. Cook noodles as directed on package; drain.
MEANWHILE stir-fry half the meat in large skillet on medium-high heat 1 to 2 min. or until done. Remove meat from skillet; cover to keep warm. Repeat with remaining meat. Add noodles, steak sauce, carrots, nuts and cilantro; sprinkle with reserved seasoning packet. Cook 2 to 3 min. or until heated through, stirring occasionally. Return meat to skillet; mix lightly.