Large and old shark's fins generally have thick fin needles, sticky texture and high quality, but because of the large fin plate, the skin is old and the sand particles are hard to fade out. Therefore, the hair will first cut off the thin edge of the shark's fin, to prevent the rise of hair sand into the fin; and then soak in cold water for 10 to 12 hours to make it soft, and then put into a pot of boiling water to cook for 1 hour, and then simmering in boiling water until most of the sand bulge, scraping with a spatula and washing, to remove the net sand, such as the net can be used to boil the water once again. Next, the shark's fins according to the old hard, soft and tender separated, respectively, into a bamboo basket, covered with a pot of stew, so as to avoid the rolling of the boiling water will be broken shark's fins. The old and hard ones are simmered for 5 to 6 hours, and the soft ones are simmered for 4 to 5 hours.
After simmering, let it cool a little and then simmer for another 1 to 2 hours.
Stewing process should pay attention to check, to all hair through the removal, wash with water, remove the odor, standby. Small and tender mixed wings. General wing plate thin and hard. Sand particles are also difficult to remove, it is appropriate to cook more stew, first cut off the wing edge. Put into the lid with boiling water. After the water temperature is lowered, change the boiling water and then soak, until you can scrape off the sand particles. Then cut off the wing root, soft and hard to separate. Separate bamboo baskets, into the pot stewed 3 to 4 hours, a little cooler that is out of the bone to carrion.
Stewing should pay attention to check, inside and outside all stew through, before you can take out and wash, standby, hair good shark's fins avoid using iron containers, otherwise it will be due to chemical changes in the shark's fins appear yellow spots, affecting the quality.
Developed shark's fins should not be immersed in water for too long to avoid odor and deterioration.
Note:
1, pay attention to the selection of materials, no matter what grade of shark's fins are used, moldy and deteriorated shark's fins should not be used.
2, when soaking, make sure to change the warm water diligently, at least 3 times, so as not to deteriorate the shark fins due to the odor of the water.
3. Before simmering in the pot, the shark's fins should be tightly clamped with two pieces of bamboo fence. This is to avoid the shark's fin burnt pot, the second is to avoid the shark's fin deformation, scattered rotten.
4, pot simmering should pay attention to time. The old hard shark's fin is generally simmered in a pot 5 to 6 hours; soft and tender shark's fin is generally simmered in a pot 4 to 5 hours. Boiling simmering shark's fin time should not be too long, if too long, the surface of the shark's fin is also easy to rupture and drill into the sand. Of course, the simmering time should not be too short, otherwise it will not be able to depilate the black membrane and sand particles.
5, simmering, should be used in a small fire pot simmering method, can not open the pot. If the fire is boiling, it is possible to cook the surface of the shark's fins, the fins become rotten, sand particles mixed into the fins, it is not easy to scrape the skin to remove the sand. In addition, before the hair system should be based on the size of the shark's fins and the degree of old and young will be separated, in order to separate the hair system, otherwise, small and young shark's fins have been rotten, old and firm but not yet hair through.
6, pot simmering shark's fin can not use iron pot and copper pot. Because the shark's fin contains sulfur protein, meet iron, meet copper will occur chemical reaction, generate iron sulfide, etc., so that the surface of the shark's fin black, yellow spots, affecting the quality of the finished product. The best choice is to simmer the shark's fin in a porcelain pot or stainless steel vessel.
7. When simmering shark's fin in a pot, or after the shark's fin is ready, it should not be dyed with oil, alkali, salt and other substances, otherwise it will cause the skin of the shark's fin to dissolve and affect the quality of the finished dish.
8, shark's fin pot simmering well, in the removal of meat and bone residue, use a bamboo stick to gently pick, try to keep the shark's fin neat, so as not to affect the beauty of the dish.
9, the shark's fin to remove the bone residue, sand, to use water to repeatedly wash and continuous rinsing and bleaching, one is to wash away the bone residue and sand, the second is to bleach clean fishy flavor.