Toss the tofu cubes in cornstarch until evenly coated.
Heat 2 tablespoons of vegetable oil in a large skillet or wok over medium-high heat.
Once hot, add the tofu to the skillet and cook, turning occasionally, until golden brown and crispy on all sides, about 8-10 minutes. Remove from skillet and set aside.
In the same skillet, add the sliced bell pepper, zucchini, and broccoli. Stir-fry for about 4-5 minutes or until the vegetables are tender-crisp.
Add minced garlic to the vegetables and stir-fry for another minute until fragrant.
In a small bowl, whisk together honey, soy sauce, rice vinegar, and sesame oil. Pour this mixture over the stir-fried vegetables in the skillet.
Return the crispy tofu to the skillet and gently toss everything together to combine, cooking for another 2 minutes until well coated and heated through.
Remove from heat and garnish with sesame seeds and chopped fresh cilantro before serving.
Notes
For a gluten-free option, use tamari instead of soy sauce.