1. Using a paper towel, pat the yellowfin tuna steaks dry. Place the steak pieces on a platter or in a plastic bag.
2. Combine the toasted sesame oil, soy sauce, kosher salt (omit this ingredient if you’re marinating your steaks for longer than a few hours), honey, pepper, and cayenne pepper in a mixing bowl; do this until the honey is completely dissolved.
3. Toss the yellowfin tuna steaks in this mixture and turn them over to ensure complete coating. Marinating the steaks is optional, but if you decide to, allow for at least 10 minutes of marinating time, or up to overnight in the refrigerator. Also, if you prefer, before coating the fish, you could set aside one or two teaspoons of the marinade mixture to drizzle on top once it’s cooked.
4. Preheat a medium skillet (ideally nonstick or a well-seasoned cast-iron skillet) on medium-high to high-temperature settings until the pan is extremely hot ( use the medium to medium-high heat for nonstick skillets). Allow 3 to 5 minutes for cast iron to heat up, and 1 minute for nonstick, depending on the skillet’s thickness.
5. In the heated pan, add the canola oil. For medium-rare results, sear the tuna for 1 to 1½  minutes on each side (2 to 2½ minutes for medium-well to well, 30 seconds for extremely rare). This timing will also vary depending on the thickness of the yellowfin tuna steaks.
6. Allow for at least 3 minutes of resting on a cutting board. Cut the steaks into ½-inch slices.  Afterward, serve the yellowfin tuna steaks hot, topped with toasted sesame seeds, green onions, and a dash of fresh lime juice, if desired.

This recipe for seared yellowfin tuna steaks is quick and easy and delivers great-tasting results onto your plate. If you’d like to see more recipe ideas to explore when cooking yellowfin tuna steaks, we recommend this video recipe for you to watch.