These rustic-looking homemade crackers are crispy, crunchy and peppered with back and white sesame seeds. Sesame seeds have a long and established history. They were once highly valued for their oil in ancient times, in fact the famous phrase "open sesame" from The Arabian Nights refers to the unique feature of the sesame seed pod, which bursts open when it reaches maturity. Adapted from a recipe from The Great British Bake Off, the key to the crackers success is rolling them as thin as…