Combine flour, salt, and shortening in a bowl. Stir in enough warm water until a ball forms, and then knead until smooth. Pinch off a 2-inch ball of dough and roll out to ¼-inch thickness. Brush with vegetable oil and sprinkle with green onions. Roll into pinwheel and flatten to desired thinness (1/8- to ¼-inch). Repeat with rest of dough.
Grease and heat skillet on medium to medium high heat. Place pancake in skillet and cook until golden brown, about 3 to 4 minutes on each side.