Deep frying : 
 (also referred to as deep fat frying) is a cooking method in which food is submerged in hot fat, such as oil. Normally, a deep fryer or chip pan is used for this; industrially, a pressure fryer or vacuum fryer may be used. Deep frying may also be performed using oil that is heated in a pot. Deep frying is classified as a dry heat cooking method[1][2] because no water is used. Typically, deep frying cooks foods quickly: all sides of a food are cooked simultaneously as oil has a high rate of heat conduction.[3]
The practice of deep frying food has been around for over 7000 years, but many modern deep fried foods were not invented until the 19th century. Deep frying is popular worldwide and accounts for a large percentage of global caloric consumption. This is despite the hazards caused by deep frying to the cooker and the environment and the increased risk of heart attacks and obesity linked to deep fried foods.
Pieces of bell pepper in a thin bubbly batter
Peixinhos da horta, the Portuguese ancestor of Japanese tempura
Although the nouns "deep-fried", "deep-frying", and the verb "deep-fry" were not documented until 1916, 1932, and 1933 (respectively); the practice of deep frying food has been around much longer. One of the earliest known practices of deep frying came from the Egyptians in the 5th millennium BCE. Later developments included the Greek's deep frying food in olive oil in the 5th century BCE. In the 1st century CE, a Roman cookbook, Apicius, appears to list the ancient Romans first use of deep frying to prepare Pullum Frontonianum.The practice of deep frying spread to other parts of Europe and Arabia in the following centuries. Deep fried foods such as funnel cakes arrived in northern Europe by the 13th century,and deep fried fish recipes have been found in cookbooks in Spain and Portugal at around the same time.Falafel arrived in the Middle East from population migrations from Egypt as soon as the 14th century. Eastern cultures including the Chinese and Japanese both had developed techniques for deep frying by the 16th century. It is possible that deep frying was introduced by the Portuguese at this time. Evidence of potato frying can be found as early as the late 17th century in Europe.
Modern deep frying began in the 19th century with the growing popularity of cast iron, particularly around the American South which lead to the development of many modern deep fried dishes.[14] French fries, invented in the late 18th century, became popular in the early 19th century western Europe.[15] Donuts were invented in the mid 19th century,[16] with foods such as onion rings,[17] deep fried turkey,[18] and corn dogs[19] all being invented in the early 20th century. In recent years, the growth of fast food has expanded the reach of deep fried foods,[20] especially french fries. In 2014, over two million tons of fries were consumed in the United States with chains such as McDonald's accounting for over one third of all sales.....

Amognus