Salt the eggplant
Lay the chopped eggplant on a tray. Sprinkle 2 tsp salt and let them sit 10–15 minutes. This removes bitterness and reduces water, so the eggplant crisps up instead of stews. Rinse well and pat dry with paper towels.
Coat with cornstarch
Toss the eggplant with 2 tbsp cornstarch. Ensure an even, light coating — this makes the crust. Shake off excess.
Mix the sauce
Whisk together soy sauce, water, dark soy (optional), sugar, and 2 tsp cornstarch in a small bowl. Set aside.
Fry the eggplant
Heat 3 tbsp vegetable oil over medium-high heat. Add eggplant in a single layer if possible. Fry 2–3 minutes per side until golden and blistered. Toss as needed so each piece gets color.
Add ginger & garlic
Toss in grated ginger and minced garlic, stirring for another 4–5 minutes until the eggplant softens and absorbs flavor.
Finish with sauce
Pour the soy-based sauce over the pan, stir quickly, and let it thicken for 1–2 minutes. The sauce should become glossy and coat each fry. Serve hot over rice or noodles and sprinkle sesame seeds and fresh herbs on top.