In a medium bowl, whisk together the peanut butter, soy sauce, rice vinegar, sesame oil, maple syrup, lime juice, zest, ginger, and garlic. Divide the dressing in half.
Place the tofu in a bowl, and toss with one half of the dressing.
In a large nonstick skillet, add the tofu and dressing over medium heat. Cook for 8 to 10 minutes, until golden, tossing occasionally.
In a large bowl, combine the cooked soba noodles, peppers, green onions, carrot, and red cabbage. Toss with the remaining dressing.