6 most disgusting food items...

Escamoles are the larvae of ants of the genus Liometopum, harvested from the roots of the agave (tequila) or maguey (mezcal) plant in Mexico. In some forms of Mexican cuisine, escamoles are considered a delicacy and are sometimes referred to as "insect caviar". (See video about cooking escamoles)

Casu marzu (also called casu modde, casu cundhídu, or in Italian formaggio marcio) is a cheese found in Sardinia, Italy, notable for being riddled with live insect larvae. Casu marzu means "rotten cheese" in Sardinian and is known colloquially as maggot cheese.
Derived from Pecorino Sardo, casu marzu goes beyond typical fermentation to a stage most would consider decomposition, brought about by the digestive action of the larvae of the cheese fly Piophila casei. These larvae are deliberately introduced to the cheese, promoting an advanced level of fermentation and breaking down of the cheese's fats. The texture of the cheese becomes very soft, with some liquid (called lagrima, from the Sardinian for "tears") seeping out. The larvae themselves appear as translucent white worms, about 8 mm (1/3 inch) long. When disturbed, the larvae can jump for distances up to 15 cm (6 inches), prompting recommendations of eye protection for those eating the cheese. Some people clear the larvae from the cheese before consuming; others do not.

Lutefisk (lutfisk) (pronounced /lʉːtəfɪsk/ in Norway, /lʉːtfɪsk/ in Sweden and the Swedish-speaking areas in Finland) is a traditional dish of the Nordic countries made from stockfish (air-dried whitefish) and soda lye (lut). In Sweden, it is called lutfisk, while in Finland it is known as lipeäkala. Its name literally means "lye fish", owing to the fact that it is made with caustic soda or potash lye.
Preparation
Lutefisk is made from air-dried whitefish (normally cod, but ling is also used), prepared with lye, in a sequence of particular treatments. The first treatment is to soak the stockfish in cold water for five to six days (with the water changed daily). The saturated stockfish is then soaked in an unchanged solution of cold water and lye for an additional two days. The fish will swell during this soaking, attaining an even larger size than in its original (undried) state, while its protein content decreases by more than 50 percent, producing its famous jelly-like consistency. When this treatment is finished, the fish (saturated with lye) has a pH value of 11–12, and is therefore caustic. To make the fish edible, a final treatment of yet another four to six days of soaking in cold water (also changed daily) is needed. Eventually, the lutefisk is ready to be cooked.
In Finland, the traditional reagent used is birch ash. It contains high amounts of potassium carbonate and hydrocarbonate, giving the fish more mellow treatment than sodium hydroxide (lyestone). It is important not to incubate the fish too long in the lye, because saponification of the fish fats may occur, effectively rendering the fish fats into soap. The term for such spoiled fish in Finnish is saippuakala (soap fish).

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