1In a bowl, stir together flour, pinch of salt, and boiling water. Add cold water, stir until dough forms. Turn out dough onto a lightly floured surface and knead until smooth, about 10 minutes. Cover and let rest for 30 minutes.
2Divide dough in half, cut each half into 5 pieces and roll each piece into a small ball.
3On a lightly floured surface using a rolling pin, roll each ball into a 3-inch pancake. Brush 5 of the pancakes with sesame oil, top each with another pancake. Roll each pancake into an 8- inch pancake.
4Heat a dry heavy skillet. Cook each pancake, without browning, on both sides until blistered with several air pockets.