Put ingredients for seasoned salt together and set aside.
Take out two large bowls: one for tossing vegetables with oil and another to place cooked vegetables in.
Heat grill pan over medium high heat. Toss the sliced onion with 2 teaspoons of vegetable oil in large bowl. Add the onions to the grill plan and cook, tossing with tongs for about five minutes. Meanwhile, toss the zucchini sticks with 2 teaspoons of oil. Add to onions and season mixture with 1/2 teaspoon of seasoned salt. Cook, tossing occasionally, for about five minutes. Remove onions and zucchini to clean large bowl. Return grill pan to heat.
Meanwhile, toss sliced peppers and jalapeño with 1 tablespoon of vegetable oil in large bowl. Add to grill pan and season with remaining 1/2 teaspoon of seasoned salt. Cook for about 10 minutes, tossing occasionally. Place in same bowl as onions and zucchini.
Brush grill pan with remaining oil, coating surface evenly. Lay tofu batons down crosswise on grill ridges. Cook for two minutes, then quickly turn to cook opposite side for about 1 1/2 minutes. Transfer tofu sticks to bowl of grilled vegetables and mix together lightly, using tongs.
Arrange fajita mixture on large platter, garnishing with lime wedges and cilantro.
Serve with flour or corn tortillas and salsa.