or 28 ounces) firm tofu (not extra-firm), cut crosswise into 4 1-inch thick batons • peanut oil, plus more as needed • tamari • honey • plus 2 teaspoons rice wine vinegar • cornstarch • medium sweet potatoes (about 8 ounces each), cut lengthwise into ¾-inch wedges • vegetable oil • kosher salt, plus more to taste • black pepper • scallions, cut into 3-inch pieces and thinly sliced lengthwise • Large pinch of sugar •