Spicy Prawn Gravy

Ingredients:
Groundnut Oil / Cooking Oil - 2 tsp
Mustard seeds - 1 tsp
Fennel seeds - 1/2 tsp
Urud dal - 1/8 tsp
Curry leaves
Onion - 3 medium
Garlic - 15 cloves
Ginger - 2 inches
Tomatoes- 2
Turmeric powder - 1/2 tsp
Cumin powder -1/2 tsp
Coriander/ Curry powder- 1 tspn
Chilli powder- 3/4 tsp
Kashmiri chilli powder- 1/2 tsp
Garam masala - 1/2 tsp
Salt - as required
Water - 75 to 100 ml
Jaggery - 15 g
Prawns - 600g
Coriander leaves