How to Make Crispy Tofu

About 1,500 years ago, in the mountains of northern China, you might have found bamboo mats lined with slabs of tofu, resting in the snow overnight. Once frozen solid, “the structure and basic character of the tofu underwent a radical transformation,” William Shurtleff and Akiko Aoyagi wrote in “The Book of Tofu” (1975). Like the…