Slice tofu (about ¾ inch thick) and dry the slices off.
In a small bowl, whisk together the soy sauce, 2 Tbs. of the rice vinegar, 2 Tbs. of the brown sugar, the garlic, ginger, 1/2 tsp. of the sesame oil, and 2 tsp. of the chile sauce. Marinate the tofu in this mixture for ½ hour then reserve the marinade to baste tofu during cooking.
Meanwhile, in another large bowl, toss the cabbage and the scallions, 1 Tbs. of the canola oil, 1 tsp. salt, and the remaining 2 Tbs. rice vinegar, 1 Tbs. brown sugar, 1/2 Tsp. sesame oil. Let sit for 15 minutes, toss again and then refrigerate.
Bake tofu at 400 for about 30 min basting with marinade and turning about every 8-10min. After cooking turn on the broiler and baste and turn until browned and slightly crispy on the edges. Cut into cubes. Warm tortillas in skillet then assemble tacos and top with sauce!