Start by cutting the pressed tofu into 1-inch cubes.
Place the tofu cubes in a bowl and sprinkle with cornstarch, tossing gently to coat evenly.
Heat 1 tablespoon of vegetable oil in a large non-stick skillet or wok over medium-high heat.
Once the oil is hot, add the tofu cubes in a single layer. Cook for 3-4 minutes on each side until golden and crispy. Remove and set aside.
In the same skillet, add the remaining tablespoon of oil. Toss in the sliced red and yellow bell peppers, snap peas, minced garlic, and minced ginger. Stir-fry for about 4-5 minutes until the vegetables are tender but still crisp.
Return the crispy tofu to the skillet and pour in the sweet chili sauce, soy sauce, and sesame oil. Stir gently to combine and heat through for another 2-3 minutes.
Remove from heat and sprinkle with sliced green onions, sesame seeds, and fresh cilantro if using.
Notes
For a gluten-free option, use tamari instead of soy sauce.