Add half the ramen seasoning packet to the sliced steak and toss well.
Cook the ramen in boiling water just until soft and the block of noodles breaks apart; do not cook to doneness. Drain and set aside.
In a skillet, heat 1 tablespoon oil until smoking. Add beef in one layer and allow to cook, entirely undisturbed until well-browned, about 1 minute. Toss the meat, add snap peas and cook 1 minute more.
Add the remaining oil, the noodles, the rest of the seasoning packet, the oyster sauce and sugar. Toss well and cook 1-2 minutes.
Transfer to a serving bowl and sprinkle with scallions to serve.