Even if this tuna steak is black and seems to be burnt: relax it is just rolled in black sesame seeds. With this little visual trick you get an astonishing visual for your next tuna steak which is also a tasty addition.
Season the tuna steaks and roll them in black sesame seeds.
Preheat The Otto Grill on high flame for 5 minutes
Grill the Tuna steaks for 1-2 minutes each side, depending on thickness, directly under the flame and then remove from the grill.