Pat the tuna steaks dry using a paper towel to remove any excess moisture. This helps the sesame seeds adhere better to the surface of the fish.

In a shallow dish, combine the black sesame seeds and white sesame seeds. Mixing the two types of sesame seeds adds visual appeal to the crust.

Press the tuna steaks into the sesame seed mixture, ensuring that the seeds coat both sides of the steaks. Gently press the seeds onto the surface of the fish to create an even coating.

In a separate bowl, mix together soy sauce, sesame oil, and vegetable oil. This flavourful marinade will enhance the taste of the tuna and complement the nuttiness of the sesame crust.

Heat a non-stick skillet over high heat and add the oil mixture. Preheating the skillet ensures a nice sear on the tuna and helps prevent sticking.

Once the skillet is hot, carefully place the sesame-crusted tuna steaks into the pan. Be cautious as the oil may splatter due to the high heat.

Sear the tuna for about 2-3 minutes on each side for medium-rare doneness, or adjust the cooking time to your preference. The sesame crust should turn golden brown, and the inside of the tuna should remain slightly pink.

Remove the tuna steaks from the skillet and let them rest for a minute. Resting allows the juices to redistribute, ensuring a moist and tender texture.

Slice the tuna steaks into thin slices and arrange them on a serving plate. Slicing the tuna reveals the beautiful sesame crust and makes it easier to eat.

Garnish with fresh cilantro leaves for a touch of freshness and serve with lime wedges on the side. The citrusy flavour of the lime complements the flavours of the tuna and sesame crust.

It is important to use high-quality, sushi-grade tuna for this recipe. The cooking time will vary depending on the thickness of the tuna steaks and your desired level of doneness. Be cautious not to overcook the tuna to maintain its tender texture. This recipe pairs well with a side of steamed rice or a refreshing salad. Enjoy the exquisite flavours and textures of Gordon Ramsay's Seared Sesame Crusted Tuna!