While this recipe prescribes 6 oz of tuna, larger or smaller steaks may be used. If you find more guests at your table, simply multiply the ingredients by the number of guests. This is a messy operation, so expect to have some wasted seeds and teryaki.
Marinade tuna in teryaki for at least 20 minutes but no more than 2 hours.
Coat steaks after marinade in sesame seeds.
Preheat grill on high while steaks are marinading.