Sesame Soba Noodle Bowl with Crispy Tofu

Name: Sesame Soba Noodle Bowl with Crispy Tofu
Ingredients: 1 (3-inch) piece fresh ginger; 2 cloves garlic; 1/3 cup rice vinegar; 1/3 cup tamari or soy sauce; 1/4 cup well-stirred tahini; 2 tablespoons toasted sesame oil; 1/2 teaspoon red pepper flakes, plus more for optional garnish; 1 (12 to 16-ounce) block extra-firm tofu; 3 medium carrots; 2 medium scallions (white and green parts); 3 tablespoons cornstarch; 2 tablespoons canola or vegetable oil; 8 to 10 ounces dried soba noodles; Sesame seeds, for garnish (optional)