Health Tip: Veggies That Cause Sparks in the Microwave...
... Are probably rich in minerals
(HealthDayNews) -- If you've wondered why your green beans cause sparks to fly when you microwave them, blame it on their density.
According to the Canadian Food Inspection Agency, dense vegetables such as green beans, carrots, and green peppers have higher amounts of minerals than other food items. The minerals act like tiny pieces of metal and can create arcing effects in a microwave.
While this doesn't harm your veggies, it may prevent them from heating thoroughly.
Please note that you should never deliberately microwave anything metal, unless it is microwave approved.