Put a proper amount of coarse sand or pebbles into the pot, stir-fry the raw walnuts together, first turn to low heat, and turn them with a shovel constantly during the frying process. When the steam in the pot gradually decreases to disappear, pour out the walnuts and let them cool.
Pay attention to the following points when buying walnuts. ① Observe the color of walnut kernel. Usually, the color of fresh walnuts is light yellow or amber. The darker the color, the older the peach stone and the worse the quality. (2) Judging whether the product is fresh and edible by smell. If the product smells like oyster oil, it means that the product has gone bad and cannot be eaten. (3) Take a pair of walnuts in your hand, that is to say, relative to its size, the weight should be enough; Walnuts are light and weightless in your hand, which generally means they are not ripe. (4) The oily skin of kernel is a sign of deterioration, and fresh white kernel is the best, followed by "chrysanthemum heart" with oil stains; The seeds are oily, sticky, dark brown and spicy, and they have been seriously deteriorated and cannot be eaten. ⑤ observation method of taking kernels: full kernels are the first, and ten shriveled kernels are the second; The color of kernel skin is mainly yellow and white, followed by dark yellow and brown, and the quality of "tiger skin walnut" with dark brown spots is not good.
Walnut is a very nutritious fruit, which can be counted as a kind of fruit. It can protect the heart function, so it is loved by many elderly people. In fact, walnuts have many benefits, not only for the elderly, but also for young and middle-aged people.