Prepare the slurry: In a small bowl, whisk together the cornflour and 2 tablespoons of cold water until the mixture is completely smooth and looks like a milky, opaque liquid. You should see no lumps at all; set this aside. This is your thickening agent.

Combine the liquid base: In a cold, medium-sized saucepan (non-stick is best), pour in the low-sodium soy sauce, honey, and rice vinegar. Add the brown sugar, finely minced garlic, and grated ginger. Do not turn on the heat yet. Stir gently to combine, watching the honey dissolve slightly into the liquid. The mixture will look a deep, murky brown.

Heat and dissolve: Place the saucepan over a medium heat. Stir occasionally with a wooden spoon or silicone spatula. You will see the sugar crystals dissolve, and the liquid will begin to shimmer and look clearer. Small bubbles will start to form around the edges of the pan, and the aroma of ginger and garlic will fill your kitchen.

Simmer to infuse: Once the mixture reaches a gentle simmer—you’ll see steady, lazy bubbles breaking the surface, not a rolling boil—lower the heat to medium-low. Let it bubble gently for 2-3 minutes. The colour will deepen slightly, and the sauce will reduce just a touch, concentrating the flavours. You will smell a sweet, savoury, and slightly sharp fragrance.

Thicken the sauce: Give your cornflour slurry a quick whisk (it will have settled) and pour it into the simmering sauce in a steady stream while stirring constantly. You will see the sauce transform almost immediately. Within 30-45 seconds, it will change from a thin, watery liquid to a glossy, thickened glaze that coats the back of your spoon. The bubbles will become larger and slower. You are looking for a consistency slightly thinner than maple syrup, as it will thicken further as it cools.

Finish with sesame oil: Remove the pan from the heat immediately. Drizzle in the toasted sesame oil and stir it through. The oil will release a deep, nutty fragrance that rounds out the sauce beautifully. The final sauce should be a rich, dark mahogany colour with a brilliant, lacquer-like shine.

Rest and cool (crucial for plating): Pour the sauce into a heatproof jug or bowl. Let it sit for 5 minutes. This rest time allows the starch molecules to settle and the sauce to reach its final, perfect consistency. It will look slightly matte and very thick. Do not skip this step.