Place all the items in the sauce ingredients list in a small jug. Whisk together and set aside.
Heat oil in a shallow frying pan.
Add sliced garlic and fry till golden brown, and then add the sliced chicken.
Cook the sliced chicken for 2 minutes till it changes colour from pink to white and then add the onions.
Fry the onions for 2 minutes and then add mixed vegetables of choice. I used frozen mixed vegetables (capsicum, carrots, baby corn and green beans) but you can use vegetables of your choice.Options include carrots, capsicum, green beans, baby corn, corn, cabbage or Asian greens like bok choy, choy sum. Let the vegetables cook through for 2 minutes and then add the sauce along with ½ cup water. Quantity of water can be increased if more gravy is preferred.
Mix it altogether and let the sauce come to a boil.
Once the sauce comes to a boil, add the cornflour dissolved in water and let the sauce thicken.
At this point, taste and adjust seasonings if required.
Add sesame oil (if using) and garnish with spring onions.
Serve hot with plain steamed rice or fried rice.