Start with wasabi whipped cream, as it will actually take longer than the tuna steaks. In a medium mixing bowl, whip heavy whipping cream using a hand mixer until stiff and bodied, approximately 3-4 minutes. Add wasabi powder and salt, continuing to whip. Set aside.
Combine both types of sesame seeds in a shallow plate, dredge and press both sides of tuna steak into seeds.
Heat 1 tablespoon vegetable oil in a medium skillet over medium heat. Sear both sides of each tuna steak, approximately 2-3 minutes for rare.
Remove and top with wasabi whipped cream.
If you've tried this recipe, come back and let us know how it was!