sift the dry ingredients together. mix with enough water to make stiff dough. form 4 to 6 balls. flatten each with rolling pin. spread each roti with corn oil and a bit of flour. roll up and let stand for 30 minutes. unroll into flat crepelike form. heat griddle. cook 3 minutes on each side until lightly browned turning frequently. sprinkle corn oil as necessary to keep it from sticking. when removing roti from griddle place in palm of hand and clap your hands 2 to 3 times. be careful not to burn yourself.