Add washed and chopped tomatoes to it. Add a little salt and cook till tomatoes soften. Add spices - turmeric powder (haldi), coriander-cumin powder (dhania-jeera powder), red chilli powder and sugar. Saute till spices release aroma.

Now add the soaked chana dal and half cup of water. Let the water boil and dal cook for 5 minutes.

Add the chopped bottle gourd (dudhi) to it. Mix well and add remaining water and salt to it. Close the pressure cooker lid with a whistle and cook for 4 whistles on high heat and 2 whistles on low heat. Let the pressure cooker cool by itself. Remove the lid and dudhi chana nu shaak is ready to serve.