fresh tuna, roughly chopped • garlic, grated or finely chopped • chives, finely chopped, fresh • black pepper, freshly ground • tamari (aged soy sauce) • panko bread crumbs • black sesame seeds • vegetable, peanut, safflower, or canola oil • dinner rolls or buns • Bibb lettuce, 4 to5 leaves • pickled ginger • cucumber seedless, thinly sliced •