que·sa·dil·la 
(kā′sə-dēyə)
(kā′sə-dēyə)n.
A flour tortilla folded in half around a savory filling, as of cheese or beans, then fried or toasted.
[American Spanish, from Spanish, diminutive of quesada, type of cheesecake, from queso, cheese, from Old Spanish, from Latin cāseus.]