This brittle gets its punchy spice from crystallized ginger and its subtle crunch from sesame seeds.
Preheat oven to 350 degrees. Toast sesame seeds on a 12-by-17-inch rimmed baking sheet until pale golden brown, about 13 minutes.
Coat another 12-by-17-inch rimmed baking sheet with cooking spray. Bring sugar, corn syrup, water, and butter to a boil in a small saucepan, stirring constantly. Reduce heat to medium-high. Cook, without stirring, until a candy thermometer reaches 300 degrees. Remove from heat, and stir in sesame seeds, ginger, baking soda, and 1/4 teaspoon salt. Pour onto coated baking sheet, and spread into an even 1/2-inch-thick layer. Let coolcompletely. Cut into pieces.