Microwave ovens emit short, high-frequency electromagnetic waves to make food vibrate at a spectacularly rapid rate, causing the food to heat up quickly. For accurate timing, it's essential to know the wattage and size of your oven, as timing varies according to these details. If you are unsure of how long to heat a food, lean toward caution. You can always continue to heat the food if it is not quite done.
To cook successfully in a microwave oven, follow the recipe directions exactly. The size and shape of the dish will affect the timing, as will the amount of food. By doubling the ingredients, you may need to double the cooking time. Also check the recommended oven wattage. Timing will need to be adjusted if you are using an oven with low wattage of less than 700 watts.
To convert recipes for low-wattage ovens
Most recipes are developed for a 700-watt microwave oven. If you have a 600-watt oven, add 10 seconds for each minute called for in the recipe. If you have a 500-watt oven, add 20 seconds for each minute called for in the recipe.
** Asian Recipes