In a bowl add sugar to lukewarm water.Mix well.
Add dry yeast to this in order to activate it.Keep it aside for 15 mins.(You will see bubbles and froth appear.)
Add yeast mixture, oil to flour,Knead well to form a tight dough.
Cover and keep it aside for 1 hour.
Knead again after adding salt.
Take some amount of dough and roll it into thick roti/flatbread.
Heat a tawa or griddle pan.
Apply water on one side and place it on the tawa(Wet side should stick on pan).
Let it cook on one side.
Flip the pan and let the flatbread face the heat directly.(It will rise slowly)
Remove from the tawa pan.
Repeat the process for desired number.Serve hot with curry.