Sieve the flour and salt together. Add oil and water to knead it into a dough.
Cover the dough and leave it aside for 20 mins.
Make medium size balls from dough.
Roll the balls into a circular shape. Spread 1/2 tsp oil on the surface.
Sprinkle whole wheat flour over it.
Hold 1/3 inch approx. wide strip with first two fingers and thumb and lift and fold backwards .
Repeat this process untill paratha is folded fully.
Hold the ends and carefully stretch the strip a bit. And roll like swiss roll.
Place the roll horizontally and roll into circular shape.
Heat tawa at medium flame. Place the paratha and spread 1 tsp oil on one side.
Flip and spread the oil again. Cook till golden brown spots appear.
Top with butter and serve.