In a skillet heat the oil.
Add the chopped onion and saute on medium heat until golden.
Add the ginger and garlic.
Add the pureed tomato along with all the spices and the green chili
Continue to cook until you see oil separating from the sides.
Add water and bring to a boil.Add salt and check the seasonings.
Reduce the heat and add the Shrimp.
Cook for about 5-6 minutes until Shrimp is cooked.
Mix well and garnish with fresh coriander.
Serve hot with Rice or Naan!