Pressure cook the potatoes for one whistle. Drain, peel off and slice into thin pieces. Set aside.
Heat oil in a saucepan and splutter the mustard seeds. Add the onions and chillies and saute till soft.
Add the tomatoes and the tomato paste and cook till the tomatoes get mashed.
Add the turmeric, paprika and stock cubes and cook for a couple of minutes.
Add in the sliced sausages and mix well to coat. Cook for around 5 minutes on low flame, add water if required.
Now add the sliced potatoes and mix well again to ensure that the masala is completed coated.
Adjust salt at this stage - this is because of the stock cubes!
Garnish with coriander leaves and devour with some hot chapathis or just some bread, to make it even more lazier!!!