Crispy Japanese-Style Tuna Croquettes

Although deep-frying came to Japanese cuisine relatively late in its history (the Portuguese are credited with giving the idea of batter-fried fish—tempura— to the Japanese in the seventeenth century), it is still a very popular cooking method. In addition to lacy batter-fried foods, the Japanese also favor a crisp and crunchy breading made from coarse, pointy shards of bread. Such breaded fried foods remain crisp even at room temperature, and croquettes like these are often packed i