Prepare Tofu: Start by pressing the tofu to remove excess moisture. Once pressed, cut the tofu into bite-sized cubes. Place the tofu cubes in a bowl and sprinkle with cornstarch, tossing until evenly coated.
Heat Oil: In a large skillet or wok, heat 2 tablespoons of vegetable oil over medium-high heat. Once the oil is hot, carefully add the tofu cubes in a single layer. Fry for about 4-5 minutes, turning occasionally until all sides are golden and crispy. Remove tofu from the pan and set aside.
Sauté Vegetables: In the same skillet, add the remaining tablespoon of oil. Add the sliced bell pepper, broccoli florets, julienned carrot, and snap peas. Stir-fry for 5-7 minutes until vibrant and tender-crisp.
Add Aromatics: Push the vegetables to the side of the skillet and add the minced garlic and grated ginger. Stir-fry for about 30 seconds until fragrant, then mix with the vegetables.
Combine & Sauce: Return the crispy tofu to the skillet. Pour the teriyaki sauce over the mixture, gently stirring to coat everything in the sauce. Cook for an additional 2-3 minutes to heat through.
Finish & Serve: Once everything is well combined and heated, remove from heat. Garnish with sliced green onions and sesame seeds. Serve hot over cooked rice or quinoa for a healthy and delicious meal.