firstly, heat ¼ cup ghee and roast 5 cashew, 5 badam and 2 tbsp raisins.
roast the nuts to golden brown and keep aside.
now add in grated lauki and saute for 5 minutes.
saute till the lauki shrinks slightly and changes colour.
add in ½ cup milk and mix well.
cook for 10 minutes or till milk thickens and lauki gets cooked completely.
further add in ¾ cup sugar and mix well.
sugar melts and boil for 5 minutes or till it thickens.
add in khoya into lauki mixture and mix well.
keep stirring till the mixture thickens and forms a mass.
add in roasted nuts and ¼ tsp cardamom powder. mix well.
finally, transfer dudhi halwa / lauki halwa to a bowl and serve hot or chilled.