Quesadilla

Method

1. grate3 min
   from a block, at room temperature
   cheese, pulled or grated coarse — pre-shredded bagged cheese is dusted with potato starch or cellulose to stop it clumping, and that coating keeps it from ever knitting into one molten sheet, which is the whole point of the dish
2. prep2 min
   cheese + salt + any optional fillings tossed together, and keep the pile modest and flat — a thick mound insulates its own center, so the outside runs out the seam before the middle has melted
3. toast1 min
   medium, dry pan
   tortilla alone, flipping once, until it goes soft and flexible with a few pale blisters — a cold tortilla cracks along the fold, a warmed one hinges
4. cook1 min
   medium-low, pan wiped with butter
   tortilla + cheese over one half only, then fold the bare half across and press flat with a spatula so the two faces touch through the cheese
5. fry5 min
   medium-low, flipping every 90 seconds
   folded quesadilla until both faces are freckled brown and the fold feels heavy and slack. Medium-low is not timidity: cheese needs roughly 130-150°F through its whole mass to flow, and that takes longer than a tortilla takes to scorch at high heat, so the fast version reliably gives you a black crust over a cold seam
6. rest1 min
   on a rack, not a plate
   quesadilla off the heat before cutting — molten cheese is liquid and will pour out of a cut wedge, while one minute of cooling brings it back to a stretch. A rack rather than a plate so escaping steam does not soften the crust you just built
7. slice1 min
   into three wedges through the fold, and serve with the salsa, sour cream, guacamole and lime alongside rather than inside — wet condiments in the fold steam the tortilla from within