Bourek is the savory filled pastry of the Lebanese table treated here as a hand sandwich: thin dough wrapped around a filling and fried or baked until crisp, then eaten the way you would eat anything portable and stuffed. The angle is the shell. Bourek is defined by its pastry, usually a phyllo-type sheet or a thin wrapper, and the whole thing succeeds or fails on whether that dough goes shatteringly crisp while the inside stays moist. The filling is the comfort, but the crust is the identity. A flabby, oil-soaked bourek is a different and much sadder object than a properly crisp one.
The build is wrap and cook. A thin sheet of dough is laid out, a band of filling is placed along it, and the dough is folded into a triangle, a cigar roll, or a flat parcel, with the edges sealed so nothing leaks. The classic fillings are a salty white cheese, often with parsley or mint worked through, or spiced minced meat with onion and warm seasoning, and a labneh or potato version turns up as well. The sealed pastry is then deep-fried until blistered and gold, or brushed with oil or butter and baked to the same end. Good execution is about the dough and the moisture line: a crust that crackles and flakes, a filling hot and just-set rather than dry or weeping, and a clean seal so the inside does not bleed into the oil. Sloppy execution underfries so the pastry is pale and greasy, overfills so the parcel bursts or the dough goes soggy from within, or seals badly so the filling escapes and the shell collapses.
It shifts mostly by filling and by shape. The cheese version is mild, salty, and stretchy when hot and is the most common. The meat version is heavier and more spiced and eats more like a small handheld kebab in pastry. Triangles, rolls, and flat squares each give a different crust-to-filling ratio, the rolls being the crispest and the flat parcels the most filling-forward. Baked rather than fried, it is lighter and less rich but never quite as crisp. The closely related stuffed pastries of the wider Levant and the larger filled pie forms are distinct constructions with their own logic and deserve their own articles rather than being folded in here. What bourek reliably delivers is the principle held constant: a thin crisp shell around a hot savory filling, sealed, cooked hard, and eaten in the hand.