Balsamic-Glazed Sirloin Steak

    3/4 pound 1/2-inch-thick boneless sirloin steak
    2 teaspoons sesame seeds
    2 teaspoons vegetable oil
    2 garlic cloves, minced
    1/8 teaspoon dried hot red pepper flakes
    3 tablespoons medium-dry Sherry
    1 tablespoon soy sauce
    2 teaspoons balsamic vinegar
    1 teaspoon honey
    1 tablespoon cold unsalted butter

Pat steak dry and season lightly with salt and pepper. Spread 1
teaspoon sesame seeds evenly on one side of steak.

In a large heavy skillet heat oil over moderately high heat until
it begins to smoke and add steak, sesame-seed-side down. Spread
remaining teaspoon sesame seeds on top of steak. Cook steak 1 1/2
minutes on each side for medium-rare meat and transfer with a
slotted spatula to a small platter. Keep steak warm.

Pour off almost all fat from skillet and add garlic and red pepper
flakes. Cook garlic mixture over moderate heat, stirring, 10 seconds
and add Sherry. Boil mixture until almost all liquid is evaporated
and remove skillet from heat. Add soy sauce, vinegar, and honey
and bring to a simmer, stirring. Add butter and stir over low heat
until incorporated. Spoon glaze over steak.