In a bowl add curd now whisk and add coriander.

Now add black salt,add green chilli and add grated cucumber.

Mix it well properly. Now take a pan add ghee,and add mustard seeds.

Add dry red chilli and mix it well. Now tadka is ready.switch off the gas. Now pour the raita in a bowl.Now add the tadka on the raita. Cucumber raita is ready to serve.