Boil potatoes in a pressure cooker with water and salt until 3 whistles.

Peel and mash the potatoes.

In a bowl, combine mashed potatoes, cumin powder, red chili powder, garam masala powder, black pepper, and black salt.

Cut the tops off the tomatoes and scoop out the pulp.

Fill the tomatoes with the potato mixture.

Heat oil in a pan.

Place the stuffed tomatoes on the pan with the stuffed side down.

Cover the pan and cook for 10-15 minutes until the tomato is soft.

Grind the cooked tomatoes into a paste.

Heat some more oil in a pan.

Add the tomato paste, salt, sugar, and tomato ketchup.

Cook for 10-12 minutes.

Pour the mixture into a bowl.

Garnish with chopped onions, green chilies, coriander, and puffed rice or salted snacks.

Serve hot.