1. Tuna:.
2. Place a large nonstick pan over high heat until hot.
3. Combine sesame seeds and miso in a bowl along with sesame oil; season with salt and pepper.
4. Coat pan with cooking spray.
5. Lightly salt tuna; dredge in sesame-wasabi mixture.
6. Reduce heat to medium and place tuna in pan. Sear until lightly browned, about 2 minutes. Flip; cook 2 minutes more.
7. Remove from heat and let rest for a few minutes.
8. Drizzle with the dynamite sauce.
9. Dynamite Sauce:.
10. Whisk the ingredients together until well blended.
11. Store in fridge.