Kashmiri Khatte Baingan

Name: Kashmiri Khatte Baingan
Ingredients: 10-12 baby aubergines slit lengthwise with stems intact; 4 tbsp vegetable oil; 1 tsp asafoetida; 3 cloves; 2” cinnamon stick; 5 green cardamom pods; 120gms tomato finely chopped; 1 heaped tbsp coriander powder; 1 tsp mild chilli powder; 1 tsp turmeric powder; 1 tsp dried ginger powder; 1 heaped tsp fennel coarsely ground; 350mls water; 1 tsp tamarind paste; Salt to taste; 1 tbsp chopped coriander for garnish; 2 tbsp vegetable oil; 450gms white onion thinly sliced; 50mls water