For the Sambhar : boil vessel ful of water.add lauki, Aloo,1 tomato.cook for 8 to 10 minutes. Or till the vegetable.are completely cook.Take another pan add oil and Musterd seeds. Add sambhar Masala, And add cook vegetable 2 cup of water and boil it for 3 to 4 minutes now add Sendha Namak. And cook for 2 to 3 minutes. Turn off the flame and now ready to serve.Add lime juice.