Sesame-Crusted Tuna with Carrot-Ginger Sauce

INGREDIENTS

• 1 medium carrot (2 ounces), peeled and coarsely chopped
• 2 tablespoons minced fresh peeled ginger (about a 2-inch piece)
• 2 scallions, thinly sliced (white and green parts separated)
• 1 tablespoon rice vinegar
• 1 to 2 teaspoons toasted sesame oil
• 1 teaspoon tamari or soy sauce
• 4 tablespoons canola oil, divided
• Coarse salt
• 1/2 cup sesame seeds, preferably mixed black and white
• 4 tuna steaks (each 6 to 8 ounces)