Turn your oven to 425F.
Pierce aubergine with a fork and lay them on a tray lined with aluminium foil in the oven for one hour and twenty minutes.
When they are almost ready, they will appear to be wilted and soft.
Remove from the oven and allow to cool.
Scoop out the flesh from the aubergines, discarding the skin.
Set aside.
Add olive oil to a large frying pan and place on medium-high heat.
Add 1 medium chopped onion and stir, when the onions start to turn golden, add cumin seeds and sauté for one minute till fragrant.
Add aubergine flesh, salt and chilies and turn heat to high.
Sauté rigorously for 5 minutes, till you see that all the excess liquid has been absorbed.
Turn heat off and set aside.