"Be specific. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 info" Nan no Qiao continued to ask.

"Look, refers to look at the transparency, pure vegetable oil is transparent, in the production process, due to the mixture of alkali lipids, waxes, impurities and other substances, the transparency will decrease; look at the color, pure vegetable oil is colorless, in the production process because the pigment in the oil is dissolved in the oil, the oil will be colored; look at the sediment, its main component is impurities.

Smell, each oil has its own unique smell. You can put a drop or two of oil on the palm of your hand, rub your hands together, and smell it carefully when it is hot. If there is a peculiar smell of oil, it means that there is a problem with the quality, and the smell is likely to be gutter oil, and if there is a smell of mineral oil, it cannot be bought.

To taste, take a drop of oil with chopsticks and taste it carefully. The oil with a sour taste is an unqualified product, the oil with a burnt bitter taste has become rancid, and the oil with a peculiar smell may be gutter oil.

Listen, take a drop or two of oil from the bottom of the oil layer, apply it to a flammable piece of paper, light it and listen to its sound. If the combustion is normal and silent, it is a qualified product; if the combustion is abnormal and makes a 'squeak' sound, the moisture exceeds the standard, and it is a substandard product; when burning, it makes a 'crackling' explosion sound, indicating that the moisture content of the oil seriously exceeds the standard, and it may be an adulterated product, and it must not be bought.

Ask, that is, to ask the merchant's purchase channel, if necessary, ask for the purchase invoice or check the sampling test report of the local food safety supervision department. ”

Ye Zhenzhen said a lot, and after finishing speaking, she looked at Nan Zhiqiao.

The corners of Nan Zhiqiao's mouth curled slightly, and he said with a smile: "Thank you for giving everyone a round of popular science publicity." ”

Ye Zhenzhen reacted at this time, and when she looked up, on the quiet central shuttle, everyone's eyes were focused on herself.

Ye Zhenzhen hurriedly retracted her head, sat back in her place, and scolded in her heart: "Nan Zhiqiao, you did it on purpose, right? Deliberately let me embarrass in front of so many people, even if the people in the central shuttle bus are not experts in this area, they know a little bit about it, and when I say this, I am very suspicious of being a showman." ”

From time to time, whispers came into her ears in the car, Ye Zhenzhen ignored Nan Zhiqiao, sat in the seat alone, and looked out the window.

The shuttle bus was fast, and soon arrived at the compound of the CDC, and after getting off the bus, Ye Zhenzhen returned directly to the Nutrition and Food Safety Institute, Nan Zhiqiao just smiled and didn't say much.

Zhen Zhen's rotation life in the Institute of Nutrition and Food Safety is very peaceful, she follows the experiments of her predecessors every day, is familiar with the work process, reads the information in her free time, and then has time, which is to chat with Fang Nana in the same group about the gossip news in the center.

――

In the blink of an eye, it was the weekend, and You Kexin had previously signed up for the "King of Chef Competition" audience judge qualification review online, both of whom had passed, and early Saturday morning, You Kexin pulled Ye Zhenzhen to the central square of the commercial street.

The "King of Chefs" competition ring has been set up, and huge billboards stand behind the ring, forming a huge curtain wall.

Under the ring is a row of judges' seats, and behind the judges' seats are seven or eight rows of audience seats, which are used for the audience and judges.

Around the auditorium, red isolation tape is used to separate it from the outside world.

Directly in front of the ring, there is a high-definition camera, and there are already staff members who have begun to debug the equipment.

In the ring, there are all kinds of cooking competition supplies, all kinds of ovens, and all kinds of raw dishes.

Because it was a weekend, there were a lot of onlookers around the venue, You Kexin and Ye Zhenzhen came to the entrance of the venue, and there were staff guards at the entrance.

Under the guidance of the staff, Zhen Zhen and Kexin entered the audience and sat down.

In the audience judges' seat, there were already more than a dozen people seated, You Kexin looked around, and sighed: "I thought we were very positive, look at the people around us, there are many people who came earlier than us." ”

Ye Zhenzhen: "There are a lot of people paying attention to this 'King Chef Competition', you see the reporters over there, and the high-definition cameras, it seems to be broadcast live on TV and the Internet, so it's normal for a lot of people to come." ”

You Kexin: "The theme of this cooking competition is roast duck, and I think most people still come for roast duck, at least me. ”

"About roast duck, I checked some information on the Internet, roast duck, originated in the period of the Northern and Southern Dynasties of China, at that time it was called roasted duck, during the Ming Dynasty, because of the Ming Taizu Zhu Yuanzhang's 'daily eclipse roast duck', the way to eat roast duck became popular. With Zhu Di moving the capital to Beijing, roast duck also became popular in old Beijing. After the roast duck technology was transmitted to Beijing, it was further developed. There are three main ways to roast duck now: hanging oven roast, oven roast and fork roast. Among them, hanging oven roasting and simmering oven roasting are the most common.

The hanging oven roasting method does not disembowel the duck, only makes a small hole in the duck's body, takes out the internal organs, and then pours boiling water into the duck's belly, and then ties the small hole, and then hangs it on the fire to roast. This method does not let the duck lose water due to being roasted, and can make the duck's skin swell and not be roasted softly, and the roasted duck skin is very thin and crispy, which is the best part of the roast duck. The hanging furnace has a furnace hole without a furnace door, and uses jujube wood, pear wood and other fruit trees as fuel, with an open flame, when the fruit wood is fired, it is smokeless, the bottom fire is vigorous, and the burning time is long. After the duck is put into the oven, the position of the duck should be changed regularly with the pick rod, and the roasted duck is full in appearance, the color is jujube red, the skin is crispy, the outside is charred and the inside is tender, and there is a fragrance of fruit wood.

The earliest oven is actually a kind of hearth, the body of the furnace is made of bricks, the size is about one meter square, the duck does not see the open flame, it is made of charcoal fire in the furnace and the hot furnace wall. Because it requires a dark fire, it requires a high level of technology. Nowadays, the early charcoal stove has long been changed to an electric oven. The roast duck in the oven has a bright and crispy skin, white and delicate meat, and a delicious taste. ”

Ye Zhenzhen said it, You Kexin was dumbfounded when she heard it, and she exclaimed: "Zhenzhen, I didn't expect you to know so much about roast duck, I haven't heard you say it before." ”

Zhen Zhen smiled and explained: "Actually, I don't know much, my dad is a chef, so he usually cares a little about cooking, plus last time you mentioned roast duck, I went to the Internet to check some information, and now I just learn and use it." ”

"Zhen Zhen, you still have a heart, the last time I signed up for the audience judges, I just downloaded some materials on the Internet, plus some of my own professional knowledge, and the result was actually approved......"

You Kexin said while staring at Zhen Zhen's expression, only to see that Zhen Zhen was looking at the roast duck tool in the ring, her brows were slightly furrowed, and You Kexin asked: "Zhen Zhen, what are you thinking, why do you feel that your expression is very serious?"

"I'm thinking, there are many ways to cook duck, there are various ways to eat, today's 'King Chef Competition' is based on roast duck, after the winner is divided, does it mean that the roast duck method is good or bad? Or does it show the level of the chef?"