1. Chop the fish very finely by hand until it holds together. In a medium mixing bowl, combine the chopped fish, minced garlic, and onion. Form the mixture into six 2-inch diameter cylinders with your hand or using a 2-inch cookie-cutter round as a mold. Place each of the completed cylinders into a small serving dish.

2. Combine the wasabi and soy sauce. Drizzle 2 tablespoons soy sauce-wasabi mixture around each cylinder. Garnish each dish as desired with green onion, chives, and a small spoonful of caviar.