Shrimp Curry

Shrimps - (medium sized, cooked)
3 medium sized onions chopped
Green chillies - 8
(split half)
Curry leaves - 2 stems
Mustard seeds - 1 tsp
Olive oil - 4 tbsp
Tomato(big) - 1
(sliced)

For marinating:
Vinegar - 1 tbsp
Ginger-garlic paste - 2 tsp
Chilly powder - 1 tsp
Black pepper - 1/2 tsp
Coriander powder - 2 1/2 tsp
Turmeric powder - 1/4 tsp
Salt- As reqd

1)Marinate shrimps with vinegar, ginger-garlic paste, chilly powder, coriander powder, turmeric powder, black pepper and salt for atleast 1/2 hour.
2)Heat oil in a pan.
3)Splutter mustard seeds.
4)Add marinated shrimps into it.
5)Saute for 5 mins on a medium-high flame. Stir it occasionally.
6)Add chopped onions, green chillies and curry leaves and saute on a medium flame for 15 mins.
7)Let the juice in shrimp and the onions mix with each other.
8)Add sliced tomato to the boiling curry and close with a lid.
9)Turn off the flame and let it stay undisturbed for atleast 15 mins.
10)Add required salt.Garnish with chopped cilantro and serve hot with rice.

P.S: You will easily find the ginger-garlic paste in the market but there is nothing like the homemade taste. So get a mortar-and-pestle and start cooking!