Lauki - Bottle Gourd Halwa by Manjula

Ingredients 2 cups lauki peeled and shredded, before shredding remove the seeds (bottle gourd, doodhi, ghia, opo squash) 2-1/2 cups milk 2 tablespoons ghee, or clarified butter 1/2 cup sugar 1/2 teaspoon coarsely ground cardamom seeds 2 tablespoons pistachio chopped