Start by preparing your homemade teriyaki sauce by combining ¼ cup soy sauce, 2 tablespoons brown sugar, 1 tablespoon rice vinegar, 1 teaspoon sesame oil, and 1 teaspoon cornstarch in a bowl. Whisk until smooth and set aside.
Press the tofu for about 15 minutes to remove excess moisture. Once done, cut it into bite-sized cubes.
In a bowl, toss the diced tofu with cornstarch until evenly coated. This will help achieve a crispy texture once cooked.
Heat 1 tablespoon of vegetable oil in a large skillet or wok over medium-high heat. Once hot, add the tofu cubes and cook until golden and crispy, about 5-7 minutes, turning occasionally. Remove the tofu from the skillet and set aside.
In the same skillet, add the remaining tablespoon of oil. Add the sliced red bell pepper, broccoli florets, and carrot. Sauté for about 4-5 minutes until the vegetables are tender but still vibrant.
Add the minced garlic and grated ginger to the skillet and cook for an additional minute until fragrant.
Return the crispy tofu to the skillet and pour the teriyaki sauce over everything. Toss the mixture to coat evenly and cook for another 2-3 minutes until the sauce thickens slightly.
Stir in the chopped green onions and give it one final toss before removing from heat.
Serve hot over a bed of cooked rice or quinoa, and sprinkle with sesame seeds for garnish.
Notes
Serve the stir fry in deep plates or bowls, garnished with additional green onions and sesame seeds.