Prepare Tofu: Press the extra-firm tofu between clean kitchen towels for at least 15 minutes to remove excess moisture. Cut into 1-inch cubes and coat with cornstarch.

Crisp Tofu: Heat oil in a skillet over medium-high heat. Add tofu cubes in a single layer, cooking for 3-4 minutes without moving. Flip and cook for another 3 minutes until golden brown.

Caramelize Veggies: Add sliced bell peppers and onions to the skillet, sauté for about 5 minutes. Add garlic and ginger, stirring for 30 seconds until fragrant.

Add Pineapple: Incorporate pineapple chunks, cooking for 2-3 minutes until slightly caramelized. Stir occasionally for even cooking.

Combine Sauce & Tofu: Whisk together soy sauce, rice vinegar, and maple syrup. Pour over pineapple and veggies, then add crispy tofu. Toss gently for 2 minutes until well coated.