Place the tuna steaks on a paper towel and gently pat dry to remove any excess liquid.
Spread the white and black sesame seeds on a plate. Dip the steaks into the seeds, make sure all sides are evenly coated.
Heat a frying pan over high heat.
Sear the steaks briefly on both sides until the sesame seeds turn golden brown, about 30-40 seconds per side. Sear the edges by holding the steaks upright with your hand or a tool.
Using your sharpest knife, cut the steaks into slices approximately 0.5 cm (about 0.2 inches) thick.
Arrange the slices on a plate, leaving a bit of space between each slice. Press them gently to create a fan-like presentation. Serve with your sauce of choice.
Notes
*For this recipe, I use frozen tuna steaks. On the day of cooking, I take them out of the freezer at least 6 hours in advance to allow for a slow defrost.SERVING SUGGESTIONS:Pair this dish with a red wine sauce or a homemade honey dill yogurt sauce.