Boil shrimp in 2 cups of water with a little salt for about 5 minutes
Drain and keep aside
Using a blender combine onion tomatoes green chili lemon juice sugar paprika curry powder salt and garlic into a paste
Heat oil in large pot and saute ground paste and the coconut over low heat stirring constantly until you get the aroma of all the spices and the oil floats to the top about 15 minutes
Add 1 cup water and bring to a boil Lower heat and add shrimp