Clean and devein the shrimps. Keep aside in a pan.
Make a paste of coconut, mustard seeds, chilli.
Add to the shrimp along with mustard oil, turmeric and salt.
Heat the pan, add the shrimp mixture along with a little water and cook covered for 8-10 minutes or till shrimp is cooked.
Garnish with thinly sliced green chilli and ginger juliennes and chopped coriander leaves. Serve hot with rice.