How to Make It
In a bowl, combine the vinegar, miso, honey, scallion, chili-garlic paste, ginger and sesame oil.
Heat the vegetable oil in a nonstick skillet until almost smoking. Add the tuna, season with salt and pepper and sear over high heat until well browned, about 2 minutes per side. Transfer to a plate and refrigerated until chilled.
Spoon the vinaigrette onto a small platter. Cut the tuna into 8 even slices and arrange the slices in the vinaigrette. Garnish with the daikon and basil and serve.