Firstly peel lauki/bottle guard then cut it from center and de-seed it. Now grate it and squeeze out it's water..

Then in a pan add ghee and let it melt then add grated lauki/bottle guard in pan and mix it and cook it until lauki/bottle guard release it's water then add milk and sugar in it and cook until milk is dry and, sugar is dissolved and lauki/bottle guard is completely cooked then add green food color and mix it properly....

Then add milk powder in it and mix it and cook it for 2 minutes... Now take a mold and grease it with oil and set lauki/bottle guard bafi mixture and on the top add chopped almonds and pistachios and refrigerator it for half an hour until it set...