1. Heat 1 tablespoon of sesame oil in a frying pan over medium heat. Add the cubed tofu and cook until golden brown on all sides. Remove and set aside.
2. In the same pan, add the remaining sesame oil. Add the broccoli, carrots, and bell pepper. Stir-fry for 5-7 minutes until tender-crisp.
3. In a small bowl, whisk together soy sauce, maple syrup, and cornstarch mixture. Pour over the vegetables and stir well to coat.
4. Add the tofu back to the pan and toss everything together. Cook for another 2-3 minutes until the sauce thickens.