01 - Toss tofu cubes with cornstarch and sea salt in a bowl until evenly coated.
02 - Heat 2 tablespoons of neutral oil in a large nonstick skillet or wok over medium-high heat. Add tofu and cook for 8 to 10 minutes, turning occasionally, until golden and crispy on all sides. Remove tofu from pan and set aside.
03 - In the same pan, add a splash of oil if needed. Sauté garlic, ginger, and white parts of spring onions for 1 minute until fragrant.
04 - Add bell pepper and carrot; stir-fry for 2 to 3 minutes until just tender.
05 - Stir in bok choy and cook for 2 more minutes until greens wilt but stems remain crisp.
06 - Whisk together soy sauce, water, maple syrup, toasted sesame oil, rice vinegar, and chili flakes in a small bowl.
07 - Return tofu to the pan and pour sauce over ingredients. Toss to coat and cook for 1 to 2 minutes until heated through and sauce thickens slightly.
08 - Remove from heat. Garnish with toasted sesame seeds and reserved spring onion greens. Serve immediately, preferably over rice or noodles.