Add all Sweet & Sour Sauce ingredients to a small saucepan and stir well. Bring to a simmer over medium heat, stirring occasionally, until sauce thickens. In a large mixing bowl, add tofu, bell pepper, zucchini, pineapple, 3 tbsp of the garlic oil, steak seasoning, and Italian seasoning. Gently toss to combine. Place onto skewers.
Heat a grill pan on medium heat, and spray with cooking spray or more garlic oil. Place skewers onto grill pan and cook 5-7 minutes, brushing generously with sauce, then flip and cook another 5-7min.
Meanwhile, heat skillet over medium heat and add remaining ½ tbsp garlic oil, corn, chipotle powder, and dash of salt. Stir and cook 2-3 min. Serve skewers topped with chipotle corn and cilantro, with remaining sauce on the side, along with lime wedges.
