In a mixing bowl, combine the plain flour, vegetable oil, salt, and ajwain seeds. Mix well.

Gradually add water and knead the mixture to form a smooth dough. Cover it with a damp cloth and let it rest for 30 minutes.

While the dough is resting, prepare the filling. Heat some oil in a pan, add cumin seeds, and let them splutter.

Add the diced potatoes, carrots, and peas to the pan. Cook them until they are tender.

Add the coriander powder, garam masala, red chilli powder, turmeric powder, and salt to the cooked vegetables. Mix well and cook for a few more minutes. Remove from heat and let it cool.

After 30 minutes, divide the dough into small portions and roll each portion into a thin oval or circle.

Cut each oval/circle in half to form two semi-circles.

Take one semi-circle, fold it into a cone shape, and seal the edge with a little water.

Fill the cone with the prepared vegetable filling.

Seal the open edge of the cone to form a triangular samosa. Press the edges to ensure they are sealed properly.

Heat oil in a deep frying pan over medium heat. Once hot, gently slide the samosas into the hot oil and fry until they turn golden brown and crispy.

Remove the fried samosas from the oil and drain excess oil on a paper towel.

Serve the delicious Vegetable Samosas hot with chutney or sauce of your choice.