How to Make It
In a small skillet, heat the 1/4 cup of canola oil until shimmering. Add the shallot and ginger and cook over moderately low heat for 3 minutes, stirring, until softened. Remove from the heat. Add the soy sauce, vinegar and chile sauce; let cool.
Light a grill. Brush the tuna with oil and season with salt and pepper. Grill the tuna over high heat, turning, until browned on all sides and still rare in the center, about 8 minutes. Transfer the tuna to a work surface and cut into 1/3-inch slices
Drizzle some of the shallot-ginger dressing onto 4 plates and arrange the tuna slices on top. Mound the arugula next to the tuna and drizzle lightly with some of the shallot-ginger dressing. Serve with Kimchi and Scallion Pancakes.