The food can be cooked in the aluminum foil container rather than it needing to be transferred to a non metallic container.Food toppings can be finished under the grill or browned as part of a combination oven cooking cycle.In order to achieve best results and at the same time avoid damaging the microwave, these simple guidelines should be followed carefully. But remember to use only shallow aluminium foil box, no deeper than 3 inches.
It can be safe to cooking in aluminum foil, but you must be careful. It’s possible to get sparks and even cause a fire with aluminum foil in the microwave.
Because aluminium is an excellent conductor of heat ( that’s why a lot of conventional cookware is made of aluminium) any heat in potential hot spots will be transferred around the container so more even heating can be achieved.
Microwaves cannot pass through metal but are absorbed by food. No food completely covered by aluminum foil or in a covered metal pan should be put in a microwave oven because food wouldn't be able to absorb the microwaves. Operating the oven empty or when the food is completely wrapped in aluminum foil can also cause damage to the oven.
Some food packaged in foil containers can be safe to microwave. Read the package heating instructions to see if the food manufacturer has specific recommendations for microwaving the product. Because food in these containers will heat from the top, it's best to microwave foods only 1-2 inches in depth so that food near the bottom will be heated thoroughly before food on the top dries and overcooks.
General rules for safe use of aluminum foil in microwave:
1.Use new, smooth foil only. Wrinkled foil can cause arcing (sparks).
2.Cover no more than 1/4 of the food with foil.
3.Shape the foil smoothly to the food so no edges stick out.
4.Do not place the foil closer than one inch from the oven walls.
5.If the microwave oven has metal shelves or a metal turntable, don't microwave food in foil containers or metal pans, and don't let foil used for shielding touch or be close to the shelves or turntable.
6.If you see arcing (sparks), immediately remove the foil shielding; transfer frozen food from foil container to a microwave-safe utensil.