Japanese street food - TAKOYAKI たこ焼き 

Takoyaki, or Octopus Balls is one of Japan’s best-known street food originated in Osaka.Takoyaki is very popular Japanese street food,hot snack, shaped like a golf ball that has crispy coating around the outside and soft filling inside, made of wheat flour, diced octopus, and ginger. Because of the octopus filling, foreigners like to refer takoyaki as octopus balls.たこ焼き
Takoyaki たこ焼き or 蛸焼 is a ball-shaped Japanese snack made of a wheat flour-based batter and cooked in a special molded pan. It is typically filled with minced or diced octopus (tako), tempura scraps (tenkasu), pickled ginger, and green onion. Takoyaki are brushed with takoyaki sauce (similar to Worcestershire sauce) and mayonnaise, and then sprinkled with green laver (aonori) and shavings of dried bonito. There are many variations to the takoyaki recipe, for example, ponzu (soy sauce with dashi and citrus vinegar), goma-dare (sesame-and-vinegar sauce) or vinegared dashi.たこ焼きtakoyaki
Yaki is derived from "yaku" (焼く) which is one of the cooking methods in Japanese cuisine, meaning "to fry or grill", and can be found in the names of other Japanese cuisine items such as okonomiyaki and ikayaki other famous Osakan dishes.たこ焼き