Cut the tomatoes into two and drop them in water and cook till they turn soft.
Let cool a bit and then peel them. Add green chillies and mash them with hands into tiny bits. By doing this the flavors of the chillies blend well with the tomatoes.
Add the curd and salt, mix.
For the tempering, heat the ghee & add the mustard, red chillies. Let the seeds splutter. Add the curry leaves and pour this tempering into the curd & tomato. Mix and serve with pulao/ pilaf, biryani, plain rice.