In a bowl, mix together flour, salt and sugar.
Slowly drizzle in boiling hot water into flour mixture and mix together.
Knead dough for 10 minutes and cover with a moist dish towel for 30 minutes.
Divide dough into four equal balls.
Flatten out dough balls to form an 8 inch circle.
Drizzle sesame oil and scatter scallions generously (about 1/4 cup per pancake) on the flattened dough.
Tightly roll up circle with scallions on the inside.
Coil the dough roll into a pinwheel. Flatten out the pinwheel and repeat steps 5-8 another two times. Repeating these steps creates those flaky layers!
Use a round bowl to cut pancakes into perfect circles.
Place pancake into a nonstick pan, brushed with remaining sesame oil, and add cheddar cheese. Fold in half and fry for 3-5 minutes each side.