Can broad beans be eaten when they turn black?
Broad beans are seasonal vegetables with strong seasonality, so we should eat them while they are fresh. After hulling, if the crescent shape at the top of the beans is light green like nails, it means that the broad beans are tender and can be eaten with shells; If it turns black, it means that it is old, and the content of vitamin C will drop slightly.
Why do broad beans turn black?
The reason why broad beans turn black is because they are rich in iron, and this iron is easily oxidized to turn black, which is a normal reaction and has no harm to the body. In fact, it is very simple to make broad beans not black, that is, when cooking with broad beans, don't cover the pot, so that the broad bean dishes will not be black.
Causes of blackening of broad beans fried in iron pan
The reasons for the blackening of fried broad beans in iron pan are as follows:
1. At high temperature, iron ions in the iron pan will be released into the pan and will react chemically with acids and other substances.
2. Broad beans contain acids such as nicotinic acid, folic acid and pantothenic acid, which react with iron ions released by the iron pan, so the broad beans fried in the iron pan will turn black.
Tip: Although the broad beans fried in iron pan are black, they are harmless to human body. People with iron deficiency can supplement iron without affecting eating.
How to make broad beans not black?
Boiled broad bean
Ingredients: broad beans 1 bowl
Seasoning: salt and water.
Exercise:
1. Wash broad beans and drain the surface water.
2, add the right amount of salt, stir evenly by hand, let stand for about 5 minutes.
3. Add appropriate amount of water (1/3 or so) and cook for about 8 minutes.