1, sweet potato vermicelli is characterized by not rotting for a long time. To make a good old duck vermicelli soup, you need to cook it slowly with a small fire to stimulate the umami flavor of all ingredients. Ordinary potato vermicelli can't stand long stewing. After stewing for 20 minutes, the potato vermicelli is basically soft and rotten, and the taste is not particularly bad. The sweet potato vermicelli, on the contrary, perfectly fits the cooking technique of this dish.

2. Sweet potato fans are more delicious than other fans. After a long period of stewing, the surface of sweet potato vermicelli is still shiny and bright, and it will not turn black and yellow. Its taste is tender and delicate, and its fragrance is perfectly matched with old duck soup. Sweet potato vermicelli is long and thin, and the surface looks smooth and elastic. It makes people drool at first sight.

3. The price of sweet potato vermicelli is cheaper than other vermicelli. Sweet potato vermicelli, also known as sweet potato vermicelli and vermicelli, is a kind of food made from sweet potato and starch in sweet potato. Because its raw materials are easily available, especially in the southern rural areas, almost every household has the custom of planting sweet potatoes, and the production process is simple, which is deeply loved by the public.

Classic sweet potato vermicelli

Second, the preparation method of old duck vermicelli soup:

1. Prepare ingredients: 200 grams of sweet potato vermicelli and 380 grams of old duck soup cooked in advance.

2. Prepare auxiliary materials: duck gizzard 30g, duck intestine 20g and duck blood 30g.

3. Prepare seasoning or seasoning: 2g of edible salt, monosodium glutamate 1g, pepper 1g, 3g of coriander, 5g of shallot, 5g of duck oil (not necessary) and 2g of sugar.

4. Production method: put the prepared old duck soup into a pot, add duck blood, duck gizzard, duck intestines and sweet potato vermicelli and cook for 20 minutes, then add edible salt, monosodium glutamate, pepper and duck oil into a new bowl, pour the cooked vermicelli, duck blood, duck gizzard and old duck soup, and finally sprinkle coriander and shallots on the bowl.