Partially freeze the beef, about 1 1/2 hours. Cut beef diagonally
across grain into 1/8-inch slices.
Mix sugar, soy sauce, pepper, green onions and garlic in glass or
plastic bowl. Stir in beef until well coated. Cover and refrigerate
30 minutes. Drain beef mixture.
Heat sesame seed in 10-inch skillet over medium heat, stirring frequently,
until golden brown. Remove sesame seed from skillet.
Heat oil in same skillet over medium-high heat. Cook beef mixture
in oil, stirring occasionally, until brown.
Serve over vermicelli, sprinkled with sesame seed.