Combine the sour cream and scallions and set aside.Arrange all your ingredients so that they’ll be easy to add to the quesadilla. Lay several layers of paper towel on a work surface and have a cooling rack and tongs ready.
In a skillet large enough to hold the tortilla, heat 2 Tbs. oil over medium-high heat. When the oil is very hot, lay a tortilla in it. Cook until the underside is slightly blistered and light brown, about 20 seconds. Lift the tortilla with tongs and hold it over the pan to let most of the oil drip back into the pan. Put the tortilla back in the pan, uncooked side down.
Quickly distribute the filling ingredients over the tortilla: about a quarter of the refried beans, a quarter of both cheeses, and 1 Tbs. or so of both the salsa and the cilantro. The tortilla will puff up in places, but that’s fine. When the second side of the tortilla is puffed and crisp but still pliable, fold the tortilla in half with the tongs, transfer it to the paper towels, and then transfer to the cooling rack while you make the next one. Cut into wedges and serve with more salsa, if you like, and the sour cream.
Write a Review