1. Place all the ingredients in a microwave-safe bowl (1 1/2 liter or 1 1/2 quart), and stir.

2. Cover with a vented microwave lid and cook on HIGH (1200W) for 3 minutes.

3. Take out and stir until sugar completely dissolves. Let cool.

* This is a good sauce for fried chicken or a dipping sauce for tempura. To make a non-oil salad dressing, add 1 part vinegar and 4 parts tempura dipping sauce.

For how long you should cook with your microwave oven, see Cooking Time vs Wattage Conversion.
For more tips of using Microwave Oven, see Sachiko's Guideline to Microwave Cooking.