In a wide bowl, add the flour, sooji, salt, baking soda, hot oil.
Mix it well.Add water little by little to make it into a dough.Let this be like a chapathi dough and not too hard.

Keep it aside for 10 minutes, else go ahead with making the gavvalu.
Make the dough into small balls,
Roll this over the gavvalu maker and make the shells.Alternatively, you can use a big fork or a big new comb.

Grease the comb before you start making.Make this for the rest of the dough.Heat oil and once it is hot, keep the flame low.Gently drop the shells into the oil.Fry this in low flame till it becomes golden brown and crisp.

Take out from oil and drain excess oil in a kitchen towel.Then serve with hot tea.