1/2 cup really good chicken stock, vegetable stock, or an appropriate mock stock such as mock chicken, dried shrimp, or mushroom, or as needed
1/2 teaspoon soy sauce
1/4 teaspoon sugar
pinch of freshly ground black pepper or a pinch of finely ground white pepper (if black specks seem inappropriate for the dish)
Directions
Put the starch in a small bowl and gradually stir in the remaining ingredients until smooth.
When your stir-fry ingredients are just cooked, stir the sauce again and pour it into the pan: Pull the food to one side and tilt the pan to make sure the sauce comes to a boil, thickens, and clears. If it seems too sticky, add a bit more stock or water. Toss the ingredients together with the sauce until they are glazed and serve.