Wash and peel turnip and chop into medium size pieces.
Heat oil in a pressure cooker and add the tempering ingredients.When seeds start crackling add chopped tomato and stir for a minute.
Add chopped turnip, green peas ,chili powder,coriander powder,salt and turmeric.Add a cup of water and pressure cook for 3-4 whistles on medium heat.
When cool down then open the cooker and roughly mash the boiled turnip with the laddle.
Add sugar and ginger and cook till it thicken slightly.
Then add lemon juice and fresh coriander and ghee
Serve hot with chapati or paratha.