Cut eggplants in half lengthways, then cut each half into 6 wedges. Place them in a large bowl and toss evenly with potato starch to coat.
Heat a wok / frying pan over medium-high heat with 2 tbsp cooking oil. Add the eggplant and pan-fry until golden on all sides, remove from the pan and set aside. Adding more cooking oil if needed
Mix all sauce ingredients in a small bowl and set aside.
Heat up 2 tbsp oil, sauté garlic and chillies for 30 seconds. Pour in the sauce and let it simmer for 1 minute.
Add fried eggplant and stir to coat with sauce. Serve hot.