noun, feminine/kesaˈdiʝa/plural: quesadillas
quesadilla; a type of pan dulce made with rice flour and queso duro blanco and topped with sesame seeds, known elsewhere in the Spanish-speaking world as a quesadilla salvadoreña
From quesada + -illa, in turn from queso + -ada (compare the development of frijolada, mariscada). One folk etymology more directly derives the word from a portmanteau of queso and tortilla.