Peel and cut the potatoes, also cut the brinjal in however shape you like and set them aside.
Switch on the flame to medium, and heat oil in a skillet. Set the flame on low, then add cumin seeds and bay leaves, and let them crackle.
Add crushed ginger-garlic-green chili, and saute for a minute. Now add chopped onions, and saute them till they get light golden brown.
Add turmeric powder, red chili powder, coriander powder, and cumin powder, and give it a nice mix.
Add a splash of water if necessary to avoid the burning of spices. Now add chopped tomatoes and salt, and cook them till they get mushy.
Now add the potatoes, mix, and cook them for 5 minutes on medium heat. Also, add brinjal, and cook them for 2 minutes.
Add water, and again cover and cook them for 15 mins till the potatoes, and brinjal become soft.
Finally add dried fenugreek leaves, mango powder, and garam masala powder. Mix properly, and let it simmer for 2 mins.
Garnish it with coriander leaves, and your aloo baingan is ready to be served.