Preheat the oven to 200°C.
Wash the eggplant, cut off the stem part and cut it into half.
Line a baking sheet with aluminium foil or parchment paper.
Place the eggplant half on the sheet, cut side down.
Brush oil over the eggplant. Roast the eggplant in the oven for 25 -30 minutes.
Remove the eggplant from the oven. The flesh should have becomes soft.
Let the eggplant cool a bit. Peel off the skin or scoop out the flesh.
Mash the eggplant lightly.
Heat 1 tbsp oil in a pan over low to medium heat.
Add fenugreek and then the mustard and cumin seeds.
Add the chopped onion and stir fry till it becomes a bit soft.
Add garlic and stir fry for a few seconds.
Add ginger and chilli pastes. Mix well.
Add red chilli powder and mix.
Add the mashed eggplant.
Add salt and mix well.
Cool the eggplant mixture a bit.
Whisk the yogurt to a smooth consistency.
Add the eggplant mixture. Mix well.
Garnish with fresh coriander and red chilli powder.