Grilled Tofu With Ginger-Soy Dressing

3 pounds firm tofu, each cake cut crosswise into six 1/4-inch-thick slices 1/4 cup soy sauce2 teaspoons dark sesame oil2 tablespoons vegetable oil, plus more for brushing1-1 1/2 tablespoons finely grated fresh ginger2 scallions, trimmed and cut into paper-thin diagonal slices (both white and green parts)Red pepper flakes for garnishToasted sesame seeds for garnishLine a plate with a double layer of paper towels, then place the tofu slices in a single layer on top. Place another double layer of paper towels on top and refrigerate for 2 hours.In a small bowl, whisk together the soy sauce, the sesame oil and 2 tablespoons vegetable oil. Add the ginger and scallions and stir. Set this dressing aside.Brush each tofu slice with vegetable oil on both sides.Prepare a hot fire in a charcoal grill, or preheat a gas grill to 500 degrees (high). Grill the tofu slices, turning them once, until heated through and golden, about 2 minutes per side. Place the tofu slices on a serving plate. Spoon the dressing over and around each piece of tofu. Sprinkle lightly with red pepper flakes and toasted sesame seeds and serve.Serves six to eight.Nutrition values per serving: 178 calories, 12 g fat (1 g saturated), 5 g carbohydrates, 0 fiber, 12 g protein, 0 cholesterol, 324 mg sodium.Adapted from "The Asian Grill" by Corinne Chang (2006 Chronicle, $22.95)