01 - Combine tempeh with soy sauce, rice vinegar, maple syrup, and sesame oil in a bowl. Toss to coat evenly and let marinate for 10 minutes.
02 - Whisk together all sauce ingredients in a separate bowl until cornstarch completely dissolves. Set aside for later use.
03 - Heat 1 tbsp oil in a large non-stick skillet over medium heat. Add marinated tempeh and pan-fry until golden brown on all sides, approximately 5–6 minutes. Remove from skillet and set aside.
04 - Add remaining 1 tbsp oil to the skillet. Sauté ginger, garlic, and optional chili flakes for 1 minute until fragrant, being careful not to burn the garlic.
05 - Add bell pepper, carrot, snap peas, and white parts of spring onions to the skillet. Stir-fry for 3–4 minutes until vegetables are just tender-crisp.
06 - Return tempeh to the skillet. Pour in the prepared sauce and cook, stirring constantly, until sauce thickens and coats all ingredients evenly, about 2 minutes.
07 - Remove from heat immediately. Garnish with green parts of spring onions, sesame seeds, and fresh coriander. Serve hot with steamed rice or quinoa.