Take maida in a bowl. add thyme,salt,oiland rub with ur hand and mix well.p
now add water little by little and knead a hard dough.it is like smosa dough.
keep aside for 30 minutes cover with wet cloth.

Heat oil in a pan and add zeera,when crackled add all other ingrediends and fry for 3-4 minutes
Add potatoes.add cornflour in potatoes mixture.cool it

Make balls and roll very thin roti on rolling board
now put aloo mixture in the middle of roti and roll it and make a roll.
u can make as big roll as u like

Now cut the roll in small pieces.it is ready to fry. Heat oil in a pan fry samosas on law heat. Fry half and put in the fridge for 15 days