Gallinejas and their cousin entresijos are classic fare for Madrid's San Isidro festival in May, when stalls and freidurías sell them to crowds celebrating the city's patron saint.
Gallinejas are cleaned lamb intestines, fried slowly in their own fat until crisp and curled, and served hot, usually with fried potatoes. A handful of traditional freidurías in the Embajadores and Arganzuela neighborhoods still fry and sell them fresh.
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