What you need:

2 tbsp oil
1 red onion sliced
½ tsp kalonji (nigella sativa) 
½ tsp turmeric
1 tsp cumin
1 tsp coriander powder
Salt
Pepper
Red chilli flakes/powder to taste
1 tbsp garlic minced
½ tbsp ginger paste
1 tsp garam masala
10 small potatoes or 2 large cubed
2 medium eggplants or 1 large chopped
½ cup chopped coriander
Some lemon juice

How to:

  1. Fry the onion in the oil till golden brown then add the spices, ginger, and garlic 
  2. Fry for a couple of minutes then add the eggplant and potatoes and fry for a couple of minutes
  3. Add some water, cover and cook on low medium until the potatoes are cooked through (add water in between if needed) 
  4. Once cooked, squeeze some lemon juice over it and garnish with the coriander
  5. Serve hot with naan 

ENJOY