Black Sesame Brittle

Directions

1. 1
   ["Preheat oven to 320\u00b0F. Roast the black sesame seeds for 10 to 15 minutes, until the sesame turns fragrant. (It's hard to tell exactly when black sesame is well toasted, so you can put a little pinch of white sesame on a separate tray and roast that in the oven together with the black sesame, and when the white sesame is nice and golden-brown, you'll know your black sesame is done too.)", "Put the caster sugar, treacle, salt, and water into a medium pot or pan, and bring it to a boil. Keep the syrup on a steady simmer, letting it bubble and heat up until it reaches 300\u00b0F (\"hard crack\"" stage). (If you don't have a sugar thermometer