To make the lemon butter sauce, heat a pan, add the 4 tbsp of lemon juice, then add chopped garlic, then add chopped parsley, add white pepper, salt as required, pepper as required and mix well and bring it to a boil.
Then take a small bowl, add the corn starch , add some water to make it a paste.
Add the corn starch paste into the lemon mixture made above.
To make the consistency of the sauce perfect add water as required.
Then add the butter and mix well till the butter will incorporate with the sauce.
Take a fish fillet marinate with salt and pepper.
Heat up a grilling pan, add some olive oiland some butter and then add the fish fillet and cook from both side or till the fish will fully cooked.
Take the fish in a beautiful white plate and pour some lemon butter sauce over it.
Finally garnish with some chives and your grilled fish with lemon butter sauce is ready to serve.
Notes
Heat the grilling pan really hot in order to obtain grilling marks.
If there is no white pepper available then avoid it.