Wash & slice aubergines. Heat ghee & saute the onion & garlic when hot for 2 to 3 minutes. Add turmeric, bay leaf & cinnamon stick & saute for a further 2 minutes, stirring frequently. Stir in sliced eggplant. Add salt, cayenne & ginger. Blend together well. Cook for 10 minutes. Add tomatoes, cover pot & cook for another 10 minutes. Sprinkle with garam masala & serve. Be careful not to overcook otherwise it will go very mushy. Madhur Jaffrey, "An Invitation to Indian Cooking"