The Proper Arrangement of Food In the Microwave and cooking patterns
Corners cook four ways - from two sides, top and bottom. Sides cook three ways - from one side, top and bottom. Center cooks two ways - from top and bottom only.
All sides cook three ways - from in / out sides, top and bottom. Ring shaped pans work well for cakes and other foods since they allow microwave energy to reach food from the top, bottom, inside and outside of the ring. If you do not have a ring pan, an empty glass or cup may be placed in the center of a round dish to create a space, thus enabling the microwave energy to penetrate all four ways.
Place thicker or denser food to the outside of dish, thinner or more porous portions to the center area of dish, preferably in a spoke pattern.
When cooking three or more similar-sized pieces of food (such as rolls, boneless chicken breasts, potatoes, custard cups, etc.), arrange them in a circle leaving one to two inches between each. This pattern promotes even cooking by giving each piece maximum exposure to the microwave energy. This pattern also allows more even distribution of energy: from the top and bottom and from the inner and outer edges of the circle.
FOOD ARRANGEMENT FOR EVEN COOKING WITHOUT STIRRING OR REARRANGING:
Sides cook three ways - from one side, top and bottom. Center cooks two ways - from top and bottom.