1. Put all the ingredients into an ovenproof bowl and stir until smooth.

2. Cover with the edge-open wrap and microwave on 600W for 1 minute.

3. Take the bowl out and stir to cool. Lasts for a month in a refrigerator.

* Without using microwave, put all the ingredients in a pot and cook over low heat stirring. Remove from the heat when it begins to boil.

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.