In the bowl of a food processor, combine flour, butter, and salt; pulse until the mixture resembles cornmeal. While pulsing, pour ¾ cup water through the machine’s feed tube in a steady stream until the dough comes together. If the dough doesn’t come together, add remaining water, 1 tablespoon at a time. Turn the mixture onto a work table and knead together once or twice to combine. Wrap in plastic wrap and let rest 30 minutes to 1 hour.
Divide the dough into 20 equal balls; cover with a towel to keep dough moist. On a well-floured surface, roll a piece of dough into a round 7 to 8 inches in diameter. Brush with oil and sprinkle with scallions. Starting at one edge, roll up the dough jellyroll fashion, then coil the roll into a spiral, like a cinnamon roll. Set the spiral aside, cover, and roll and shape the remaining balls.
Roll each piece again into a 7- to 8-inch circle. Remember to keep covered. Warm a heavy saute pan over medium-high heat. Add a pancake to the pan and cook about 1 minute, until golden brown. Flip and cook the other side 1 minute. Repeat with remaining pancakes.