Step 1

Preparation Mix first 7 ingredients in small bowl. Transfer 2 tablespoons spice mixture to spice grinder; grind finely. Mix in 1 teaspoon salt. DO AHEAD: Can be made 1 week ahead. Store whole and ground spice mixtures separately in airtight containers at room temperature.

Step 2

Rub ground spice mixture all over steak. Wrap in plastic; chill 3 hours.

Step 3

Preheat oven to 475°F. Unwrap steak; place in large ovenproof skillet. Mix whole spice mixture with 1 1/2 cups kosher salt in medium bowl. Add 1/4 cup water; stir to moisten. Pack salt over top and sides of steak. Roast until instant-read thermometer inserted horizontally into steak registers 130°F for medium-rare, about 25 minutes. Let stand at room temperature 8 minutes. Crack salt crust with wooden spoon; discard. Turn steak over. Slice into 1/2-inch-thick slices.