First make the pastry for samosa.

Take flour, salt and oil in a mixing bowl and rub well. Slowly add in water and make into a firm dough. Knead it for 5 mins. Apply some oil on top and cover it with a bowl and let it rest for 30 mins.

Divide the dough into equal portion. Roll into a thin roti. Do this to all dough.

Heat a tawa on high heat. Put the thin roti on the tawa and cook less than 20 seconds on each side until the roti is cooked slightly.

Take it off the heat and cut in the shape of squares. Now slice it in the middle, so that you get a rectangle (See pictures for more detail). Now set this aside for a moment.

Meanwhile make the filling for the samosa...Peel Tapioca and Potatoes and grate it using coarse grater. Take this in a colander and wash well so that the starch from this goes away..

Put this in a steamer and steam for 20-25 mins until it is cooked. Remove and set aside.

Heat oil in a kadai..Add in fennel seeds and cumin seeds.

Add in peas and mix well. Now add in chilli powder, coriander powder and mix well.

Season with salt and mix well..Now add in cooked tapioca – potato mixture and mix well. Cook this for 5 mins. Remove and set aside to cool.

Make a thick paste out of flour and water for sealing

Now take one of the rectangle and apply this paste all over the sheet..

Fold it from one side and from the other so that it forms in a shape of a cone..

Now put a spoonful of filling in it and seal it on all sides(see picture).

Set this samosa aside to dry up. Now make all samosas like this..

Heat oil for deep frying and fry this samosa on medium heat for 3-5 mins until slightly cooked. Remove it and set aside.

Now increase the heat to a high and fry again till golden brown..

Serve hot with ketchup or any dip.