Savoury Chickpeas in Tomato Glaze

Ingredients: 
1 1/4 cups dried chickpeas 
4-5 cups water 
3 tbsp olive oil or ghee 
1/2 tsp mustard seeds 
1 1/2 tsp cumin seeds 
1 1/2 tsp minced fresh ginger 
1 1/2 tsp fresh green chillies, seeded and chopped 
10 fresh curry leaves 
1 1/4 cups ripe, finely chopped tomatoes 
1 tsp turmeric 
1/4 cup chopped fresh coriander leaves 
1 1/2 tsp chat masala 
1/2 tsp garam masala 
1 1/4 tsp salt 
1 tbsp peanut butter