Marinating the steak in an oil-and-vinegar blend flavors the meat, and the vinegar serves as a tenderizer. Be aware that the vinegar will change the surface color of the meat from dark or bright red to a brownish shade.
*To toast sesame seed, spread in shallow baking pan; bake at 350°F. for 6 to 8 minutes or until golden brown, stirring occasionally. Or place seed in small skillet; stir over medium heat for 8 to 10 minutes or until light golden brown.
To broil steak, place on broiler pan; broil 4 to 6 inches from heat using times above as a guide.