Dice the sushi-grade tuna into small cubes and set aside.
In a mixing bowl, whisk together grated ginger, lime juice, tamari (or soy sauce), sesame oil, honey, and chili flakes to create the dressing.
Gently fold the cubed tuna into the dressing and let marinate for about 10 minutes.
Using a ring mold or spoon, plate the tartare mixture carefully without squishing it.
Garnish with scallions and white sesame seeds before serving.
